Frequency from first principles

A - frequencies

1. 2 Hz
2. 4 Hz
3. 3 Hz
4. 2 Hz
5. 6 Hz
6. 25 Hz
7. 256 Hz
8. 500 Hz
9. 0.2 Hz
10. 10⁶ Hz
11. 0.1 Hz
12. 3.8 Hz

B - periods

1. 1 s
2. 0.2 s
3. 0.01 s
4. 2 s

C - frequencies

1. 1 Hz
2. 10 Hz
3. 50 Hz
4. 1.6 Hz
5. 10⁶ Hz
6. 66.7 Hz
7. 5882.4 Hz
8. 0.3 Hz