aid vs pursue

aid

verb
  • To provide support to; to further the progress of; to help; to assist. 

  • To climb with the use of aids such as pitons. 

noun
  • Help; assistance; succor, relief. 

  • An historical subsidy granted to the crown by Parliament for an extraordinary purpose, such as a war effort. 

  • A helper; an assistant. 

  • An exchequer loan. 

  • Something which helps; a material source of help. 

  • A pecuniary tribute paid by a vassal to his feudal lord on special occasions. 

  • The rider's use of hands, legs, voice, etc. to control the horse. 

pursue

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

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

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

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

  • To act as a legal prosecutor. 

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