auricle vs cowslip

auricle

noun
  • The outer ear or pinna. 

  • Synonym of atrium. 

  • An anterior ear-shaped appendage of the left or right atrium of the human heart. 

  • Any appendage in the shape of an ear or earlobe. 

cowslip

noun
  • Pulmonaria angustifolia, blue cowslip or narrow-leaved lungwort 

  • Primula deorum, a flowering plant known as God's cowslip and rila cowslip 

  • A low-growing plant, Primula veris, with yellow flowers. 

  • Primula florindae, a flowering plant known as giant cowslip and Tibetan cowslip 

  • marsh marigold, Caltha palustris, a plant in the buttercup family, growing in wet, boggy locations. 

  • Primula sikkimensis, a flowering plant known as Himalayan cowslip and Sikkim cowslip 

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