crabapple vs cultivated crab apple

crabapple

noun
  • An unpleasant person; a person who is crabby. 

  • The fruit of this tree. 

  • Any of the wild species of apple tree, genus Malus, which generally yield small, bitter fruit (in comparison to domestic apples, Malus domestica). 

cultivated crab apple

How often have the words crabapple and cultivated crab apple occurred in a corpus of books? (source: Google Ngram Viewer )