crackleberry vs whort

crackleberry

noun
  • The high-bush huckleberry, Gaylussacia baccata, native to eastern North America, or the fruit of this shrub 

  • An imaginary shrub, or the fruit of this shrub 

whort

noun
  • The whortleberry, or bilberry. 

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