bird's eye chili vs capsicum

bird's eye chili

noun
  • A spicy chili pepper, a cultivar from the species Capsicum annuum, commonly found in Southeast Asia. 

capsicum

noun
  • Any of several tropical American plants, of the genus Capsicum, principally the species Capsicum annuum and Capsicum frutescens, that are cultivated as edible peppers. 

  • The spicy fruit of the above plants, the bell pepper. 

How often have the words bird's eye chili and capsicum occurred in a corpus of books? (source: Google Ngram Viewer )