grapevine vs rumor

grapevine

noun
  • A rumor. 

  • A leglock. 

  • The plant, a vine of genus Vitis, on which grapes grow. 

  • A move in which the feet are alternately placed in front of each other, while both remaining on the ice or ground, incorporating half-turns. 

  • An informal person-to-person means of circulating information or gossip. 

verb
  • To restrain in a leglock. 

rumor

noun
  • Information or misinformation of the kind contained in such claims. 

  • A statement or claim of questionable accuracy, from no known reliable source, usually spread by word of mouth. 

verb
  • To tell a rumor about; to gossip. 

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