opinion poll vs polling

opinion poll

noun
  • A poll organized in an attempt to quantify public opinion on a subject. 

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. 

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