ice plant vs iceplant

ice plant

noun
  • 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. 

  • Especially, Carpobrotus edulis. 

iceplant

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