and then there are the frequencies that are naturally occuring,,,
just some,,
Table of NMR isotopes
1 1H 100 1/2 5.58569 750.03 MHz
1 2H 0.015 1 0.85744 0.00288 115.13 MHz
2 3He 0.00013 1/2 5.95792 800.01 MHz
3 6Li 7.42 1 0.82205 -0.00064 110.38 MHz
3 7Li 92.6 3/2 2.17096 -0.04000 291.51 MHz
4 9Be 100 3/2 -0.78500 0.05300 105.41 MHz
5 11B 80.4 3/2 1.79242 0.04000 240.68 MHz
5 10B 19.6 3 0.60022 0.08608 80.60 MHz
6 13C 1.11 1/2 1.40482 188.64 MHz
7 14N 99.6 1 0.40378 0.01930 54.22 MHz
7 15N 0.365 1/2 -0.56638 76.05 MHz
8 17O 0.037 5/2 -0.75752 -0.02600 101.72 MHz
9 19F 100 1/2 5.25773 705.99 MHz
10 21Ne 0.257 3/2 -0.44120 0.10290 59.24 MHz
11 23Na 100 3/2 1.47839 0.10800 198.51 MHz
12 25Mg 10.1 5/2 -0.34218 0.22000 45.95 MHz
13 27Al 100 5/2 1.45660 0.15000 195.59 MHz
14 29Si 4.7 1/2 -1.11060 149.13 MHz
15 31P 100 1/2 2.26320 303.90 MHz
16 33S 0.76 3/2 0.42911 -0.06400 57.62 MHz
17 35Cl 75.5 3/2 0.54792 -0.08249 73.57 MHz
17 37Cl 24.5 3/2 0.45608 -0.06493 61.24 MHz
19 41K 6.88 3/2 0.00 MHz
19 39K 93.1 3/2 0.26099 0.05400 35.05 MHz
20 43Ca 0.145 7/2 -0.37641 50.54 MHz
21 45Sc 100 7/2 1.35906 -0.22000 182.49 MHz
22 47Ti 7.25 5/2 -0.31539 0.29000 42.35 MHz
22 49Ti 5.51 7/2 -0.31548 0.24000 42.36 MHz
23 51V 99.8 7/2 1.46836 -0.05150 197.17 MHz
23 50V 0.24 6 0.55659 0.20900 74.74 MHz
24 53Cr 9.55 3/2 -0.31470 -1.29545 42.26 MHz
25 55Mn 100 5/2 1.38190 0.33000 185.56 MHz
26 57Fe 2.19 1/2 0.18060 24.25 MHz
27 59Co 100 7/2 1.31800 0.42000 176.98 MHz
28 61Ni 1.19 3/2 -0.50001 0.16200 67.14 MHz
29 65Cu 30 3/2 1.58800 -0.19500 213.23 MHz
29 63Cu 69.1 3/2 1.48400 -0.22200 199.27 MHz
30 67Zn 4.11 5/2 0.93460 0.15000 125.50 MHz
31 71Ga 39.6 3/2 1.70818 229.37 MHz
31 69Ga 60.4 3/2 1.34439 180.52 MHz
32 73Ge 7.76 9/2 -0.19544 -0.19000 26.24 MHz
33 75As 100 3/2 0.95965 0.29000 128.86 MHz
34 77Se 5.12 1/2 1.06930 143.58 MHz
35 79Br 50.5 3/2 1.40427 0.29300 188.56 MHz
35 81Br 49.5 3/2 1.51371 0.27000 203.26 MHz
36 83Kr 11.6 9/2 -0.21570 0.26000 28.96 MHz
37 87Rb 27.9 3/2 1.82760 0.13000 245.40 MHz
37 85Rb 72.2 5/2 0.53928 0.27300 72.41 MHz
38 87Sr 7.02 9/2 -0.24291 0.15000 32.62 MHz
39 89Y 100 1/2 -0.27364 36.74 MHz
40 91Zr 11.2 5/2 -0.52145 70.02 MHz
41 93Nb 100 9/2 1.37120 -0.28000 184.12 MHz
42 97Mo 9.46 5/2 -0.37340 0.20000 50.14 MHz
42 95Mo 15.7 5/2 -0.36560 -0.01900 49.09 MHz
44 99Ru 12.7 3/2 -0.24900 0.07600 33.43 MHz
44 101Ru 17.1 5/2 -0.27900 0.44000 37.46 MHz
45 103Rh 100 1/2 -0.17680 23.74 MHz
46 105Pd 22.2 5/2 -0.25600 0.66000 34.37 MHz
47 107Ag 51.8 1/2 -0.22725 30.51 MHz
47 109Ag 48.2 1/2 -0.26174 35.15 MHz
48 111Cd 12.8 1/2 -1.19043 159.85 MHz
48 113Cd 12.3 1/2 -1.24540 167.23 MHz
49 113In 4.28 9/2 1.22864 0.84600 164.98 MHz
49 115In 95.7 9/2 1.23129 0.86100 165.33 MHz
50 117Sn 7.61 1/2 -2.00208 268.83 MHz
50 119Sn 8.58 1/2 -2.09456 281.25 MHz
50 115Sn 0.35 1/2 -1.83770 246.76 MHz
51 121Sb 57.3 5/2 1.34550 -0.33000 180.67 MHz
51 123Sb 42.8 7/2 0.72876 -0.68000 97.86 MHz
52 123Te 0.87 1/2 -1.47360 197.87 MHz
52 125Te 6.99 1/2 -1.77660 238.56 MHz
53 127I 100 5/2 1.12530 -0.78900 151.10 MHz
54 131Xe 21.2 3/2 0.46124 -0.12000 61.93 MHz
54 129Xe 26.4 1/2 -1.55595 208.93 MHz
55 133Cs 100 7/2 0.73785 -0.00300 99.08 MHz
56 135Ba 6.59 3/2 0.55884 0.20000 75.04 MHz
56 137Ba 11.3 3/2 0.62515 0.34000 83.94 MHz
57 139La 99.9 7/2 0.79520 0.20000 106.78 MHz
57 138La 0.089 5 0.74278 0.51000 99.74 MHz
59 141Pr 100 5/2 1.60000 -0.04100 214.84 MHz
60 143Nd 12.2 7/2 -0.30760 -0.56000 41.30 MHz
60 145Nd 8.3 7/2 -0.19000 -0.29000 25.51 MHz
62 147Sm 15 7/2 -0.23220 -0.18000 31.18 MHz
62 149Sm 13.8 7/2 0.19150 0.05600 25.71 MHz
63 153Eu 52.2 5/2 0.61340 3.92000 82.37 MHz
63 151Eu 47.8 5/2 1.38900 1.53000 186.51 MHz
64 157Gd 15.7 3/2 -0.22530 1.34000 30.25 MHz
64 155Gd 14.7 3/2 -0.17230 1.30000 23.14 MHz
65 159Tb 100 3/2 1.34200 1.34000 180.20 MHz
66 161Dy 18.9 5/2 -0.18900 2.47000 25.38 MHz
66 163Dy 25 5/2 0.26600 2.51000 35.72 MHz
67 165Ho 100 7/2 1.19200 2.73000 160.06 MHz
68 167Er 22.9 7/2 -0.16180 2.82700 21.73 MHz
69 169Tm 100 1/2 -0.46600 62.57 MHz
70 173Yb 16.1 5/2 -0.27195 2.80000 36.52 MHz
70 171Yb 14.3 1/2 0.98850 132.73 MHz
71 175Lu 37.4 7/2 0.63943 5.68000 85.86 MHz
72 179Hf 13.8 9/2 -0.14240 5.10000 19.12 MHz
73 181Ta 100 7/2 0.67729 3.44000 90.94 MHz
74 183W 14.4 1/2 0.23557 31.63 MHz
75 187Re 62.9 5/2 1.28780 2.22000 172.92 MHz
75 185Re 37.1 5/2 1.27480 2.33000 171.18 MHz
76 187Os 1.64 1/2 0.13110 17.60 MHz
76 189Os 16.1 3/2 0.48800 0.80000 65.53 MHz
77 191Ir 37.3 3/2 0.09700 0.78000 13.02 MHz
77 193Ir 62.7 3/2 0.10700 0.70000 14.37 MHz
78 195Pt 34 1/2 1.21900 163.68 MHz
79 197Au 100 3/2 0.09797 0.59400 13.15 MHz
80 201Hg 13.2 3/2 -0.37348 0.42000 50.15 MHz
80 199Hg 16.8 1/2 1.01177 135.86 MHz
81 205Tl 70.5 1/2 3.27540 439.81 MHz
81 203Tl 29.5 1/2 3.24451 435.66 MHz
82 207Pb 22.6 1/2 1.17480 157.75 MHz
82 177Hf 18.5 7/2 0.22670 4.50000 30.44 MHz
83 209Bi 100 9/2 0.93800 -0.46000 125.95 MHz
90 229Th 0 5/2 0.16000 4.40000 21.48 MHz
92 235U 0.72 7/2 -0.10000 4.30000 13.43 MHz