gherkin vs wild cucumber

gherkin

noun
  • A small cucumber, often pickled whole. 

  • The penis. 

wild cucumber

noun
  • Armenian cucumber, in the flexuosus cultivar group of Cucumis melo subsp. melo. 

  • Echinocystis lobata, a species of gourd found throughout most of North America 

  • Marah, a genus of gourds native to western North America 

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