The process of how fast or slow energy contracts back towards its center point of source field is the Vibration rate.
The process of how fast or slow that same energy expands away from the center point of the source field is the Oscillation rate.
The combination of both the pattern of Vibration (contraction) and Oscillation (expansion) speed is what determines the frequency rate of all energy and things. As our personal, collective and planetary consciousness raises frequency, the matter world, including our physical bodies, also becomes less dense as our frequency increases. 
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples include a swinging pendulum and alternating current power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but is sometimes used as a synonym of "oscillation". Oscillations occur not only in mechanical systems but also in dynamic systems in virtually every area of science: for example the beating human heart, business cycles in economics, predator-prey population cycles in ecology, geothermal geysers in geology, vibrating strings in musical instruments, periodic firing of nerve cells in the brain, and the periodic swelling of Cepheid variable stars in astronomy.
Law of Vibration
Beyond the material realm and into a realm in which everything is energy is the Law of Vibration. A Natural Universal Law that states that nothing rests; everything moves; every-thing vibrates which forms a rate of Frequency. The lower the vibration, the slower the vibration; the higher the vibration the faster the vibration. The difference between the manifestations of the physical, mental, emotional and spiritual result simply from different levels of vibrating energy, or frequencies. So, while the feelings of fear, grief and despair vibrate at a very low Rate of Frequency, the feelings of love, joy and gratitude vibrate much quicker.