desert-thorn vs thornbush

desert-thorn

noun
  • Any desert-growing member of the genus Lycium 

thornbush

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

  • Hyponyms: bramble, briar 

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