jungle drums vs vineyard

jungle drums

noun
  • An informal network of news and gossip; the grapevine. 

  • Drumming performed, or as performed, in the rituals of traditional pre-industrial societies. 

vineyard

noun
  • A grape plantation, especially one used in the production of wine. 

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