daisy vs helianthus

daisy

noun
  • A wild flowering plant Bellis perennis of the Asteraceae family, with a yellow head and white petals 

  • Many other flowering plants of various species, mostly among the asterids. 

  • A boot or other footwear. 

helianthus

noun
  • Any plant, of the genus Helianthus, having large flower heads with dark disk florets and showy yellow rays; the sunflowers 

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