canvass vs impetrate

canvass

verb
  • To seek or solicit donations, information, opinions, support, etc.; to conduct a survey. 

  • To seek the support of voters or a constituency in a forthcoming election or poll; to campaign. 

  • To thoroughly examine or investigate (something) physically or by discussion; to debate, to gather opinion, to scrutinize. 

  • To seek the support of (voters or a constituency) in a forthcoming election or poll through personal solicitation or public addresses. 

  • To scrutinize (the ballot in an election or the votes cast) and reject irregular votes; also, to challenge or dispute (an election result). 

  • To seek or solicit donations, information, opinions, support, etc. from (people or a place) 

  • To debate, to discuss. 

noun
  • A seeking or solicitation, or determination, of support or favourable votes in a forthcoming election or poll. 

  • A scrutiny of the votes cast in an election to reject irregular votes; also, a tally, audit, and certification of votes. 

  • A seeking or solicitation of donations, information, opinions, support, etc. 

impetrate

verb
  • To obtain by asking; to procure upon request. 

  • To ask for; to demand. 

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