Subject: What is the frequency and how is it determined of virtual particles ?

Hi !
(I haven't found the answer to this in MadSci database.)
To, perhaps, clarify my question, suppose I have two particles interacting
electrostaticly. One may be free to move but atleast the second one is
contained by a constant force so that the total force on the particle is
F = 0 at a certain permanent point. Now, since there's a virtual particle
exchange - and energy emplies that the particle would move from its 
permanent location, since E = F * x , the particle in question would 
oscilate around the permanent point. The question is - how do I calculate 
the frequency at which this would occure (naturally, I can find the total 
energy from the energy conservation law) ?
Thank you !
Bye !

Re: What is the frequency and how is it determined of virtual particles ?