Hottentot fig vs noonflower

Hottentot fig

noun
  • Carpobrotus edulis, a South African plant. 

  • The acidic edible fruit of this plant. 

noonflower

noun
  • Flowers of the family Aizoaceae, especially those of the genus Carpobrotus. 

  • Flowers of the genus Bauhinia. 

  • Tragopogon, a type of aster that closes at midday. 

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