grapefruit vs orange grove

grapefruit

noun
  • The tree of the species Citrus paradisi, a hybrid of pomelo (Citrus maxima) and sweet orange. 

  • The large spherical tart fruit produced by this tree. 

orange grove

noun
  • A group of cultivated orange trees 

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