autumn crocus vs naked lady

autumn crocus

noun
  • especially, Colchicum autumnale. 

  • Any of several species of genus Colchicum that bloom in the Fall 

naked lady

noun
  • Colchicum autumnale, the meadow saffron. 

  • Used other than figuratively or idiomatically: see naked, lady. 

  • Euphorbia tirucalli, a tree found in semi-arid tropical climates 

How often have the words autumn crocus and naked lady occurred in a corpus of books? (source: Google Ngram Viewer )