ice plant vs sour fig

ice plant

noun
  • Especially, Carpobrotus edulis. 

  • A succulent annual, Mesembryanthemum crystallinum, of the fig marigold family, having pale pink flowers and fleshy leaves covered with glistening water vesicles. 

  • Any of several plants in fig marigold family, Aizoaceae, which were formerly classified in the genus Mesembryanthemum along with Mesembryanthemum crystallinum. 

sour fig

noun
  • Carpobrotus edulis, a creeping plant of South Africa with edible fruit. 

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