polling vs straw poll

polling

noun
  • The action of taking a poll. 

  • the process of voting in an election. 

  • A technique that continually interrogates a peripheral or service to see if it has data to transfer. 

straw poll

noun
  • A survey of opinion or a vote that is nonbinding, unofficial, casual, or ad hoc. 

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