greenery vs thornbush

greenery

noun
  • Green foliage or verdure. 

  • Foliage used as decoration. 

  • Marijuana. 

thornbush

noun
  • Any of many thorny or spiny shrubs and bushes. 

  • Hyponyms: bramble, briar 

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