leave off vs pursue

leave off

verb
  • To stop with a view to resuming at a later point. 

  • To omit. 

  • To desist; to cease. 

pursue

verb
  • To follow urgently, originally with intent to capture or harm; to chase. 

  • To follow, travel down (a particular way, course of action etc.). 

  • To aim for, go after (a specified objective, situation etc.). 

  • To participate in (an activity, business etc.); to practise, follow (a profession). 

  • To act as a legal prosecutor. 

How often have the words leave off and pursue occurred in a corpus of books? (source: Google Ngram Viewer )