aster vs camomile

aster

noun
  • Any of several plants of the genus Aster; one of its flowers. 

  • A star-shaped structure formed during the mitosis of a cell. 

camomile

noun
  • Any of several other similar plants. (See below) 

  • Matricaria recutita (formerly known as Matricaria chamomilla), German chamomile or Hungarian chamomile, with fragrant flowers used for tea, and as an herbal remedy. 

  • Chamaemelum nobile (formerly Anthemis nobilis), English chamomile or Roman chamomile, a ground cover with fragrant foliage. 

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