Married Rofers or Rofers in a LTR

how often, after say 3 years, do you do the sechsy time? with your partner that is

most rabbits die from having fly eggs laid in their unclean posteriors.  the maggots eat them from there inwards.  this knowledge comes from having a vet (non vietnam) as a cousin

To be fair rabbits need to get breeding again as there are far fewer of them than there were a few years ago.  

I'm currently exhausted from my activities last night but that was only date number 3 so hardly a relationship.