grapevine vs intelligence

grapevine

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

  • 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. 

  • A rumor. 

verb
  • To restrain in a leglock. 

intelligence

noun
  • Information, often secret, about an enemy or about hostile activities. 

  • The quality of making use or having made use of such capacities: depth of understanding, mental quickness. 

  • A political or military department, agency or unit designed to gather information, usually secret, about the enemy or about hostile activities. 

  • Capacity of mind, especially to understand principles, truths, facts or meanings, acquire knowledge, and apply it to practice; the ability to comprehend and learn. 

  • An entity that has such capacities. 

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