bitter orange vs pampelmoes

bitter orange

noun
  • The fruit of these species. 

  • A citrus tree of the species Citrus limetta. 

  • A citrus tree of the species Citrus ×aurantium, also called Citrus aurantium. 

pampelmoes

noun
  • Synonym of pomelo, as both a large fruit of Southeast Asia and as a catchall term for other related fruit such as the grapefruit. 

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