cockscomb vs rambutan

cockscomb

noun
  • A yellow rattle, Rhinanthus minor (flowering plant native to Eurasia) 

  • The fleshy red crest of a rooster 

  • An annual garden plant (Celosia argentea var. cristata, syn. Celosia cristata), having showy red clusters of flowers 

  • A serrated cleat once fitted to the yards of a square-rigged ship and used when the sail was being reefed 

  • A red cap once worn by court jesters 

rambutan

noun
  • A tree, Nephelium lappaceum, of Southeast Asia. 

  • The fruit of this tree. 

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