Whats the difference between frequency and resonance?

Question: Whats the difference between frequency and resonance?
- Keywords:
  energy,
  properties,
  wave
Asked by to Mike on 13 Mar 2014. This question was also asked by .
- Mike Lee answered on 13 Mar 2014:
  
  A resonance is one particular frequency. If you swing on a swing in the park, you are swinging at the resonant frequency, and it feels great! Imagine if you were swinging 5 times faster, the forces would feel much more uncomfortable. The resonant frequency is the frequency that something wants to swing/vibrate at.

Question: Whats the difference between frequency and resonance?