频率是每单位时间重复事件的发生数量。它是在赫兹（Hz）中测量的。
1 Hz = 999,999,999,999,999.9 fHz
1 fHz = 1.0000e-15 Hz
例子:
将15 赫兹转换为Femtahertz：
15 Hz = 14,999,999,999,999,998 fHz
| 赫兹 | Femtahertz |
|---|---|
| 0.01 Hz | 9,999,999,999,999.998 fHz |
| 0.1 Hz | 100,000,000,000,000 fHz |
| 1 Hz | 999,999,999,999,999.9 fHz |
| 2 Hz | 1,999,999,999,999,999.8 fHz |
| 3 Hz | 2,999,999,999,999,999.5 fHz |
| 5 Hz | 4,999,999,999,999,999 fHz |
| 10 Hz | 9,999,999,999,999,998 fHz |
| 20 Hz | 19,999,999,999,999,996 fHz |
| 30 Hz | 29,999,999,999,999,996 fHz |
| 40 Hz | 39,999,999,999,999,990 fHz |
| 50 Hz | 49,999,999,999,999,990 fHz |
| 60 Hz | 59,999,999,999,999,990 fHz |
| 70 Hz | 69,999,999,999,999,990 fHz |
| 80 Hz | 79,999,999,999,999,980 fHz |
| 90 Hz | 89,999,999,999,999,980 fHz |
| 100 Hz | 99,999,999,999,999,980 fHz |
| 250 Hz | 249,999,999,999,999,970 fHz |
| 500 Hz | 499,999,999,999,999,940 fHz |
| 750 Hz | 749,999,999,999,999,900 fHz |
| 1000 Hz | 999,999,999,999,999,900 fHz |
| 10000 Hz | 9,999,999,999,999,998,000 fHz |
| 100000 Hz | 99,999,999,999,999,980,000 fHz |
规则