prickle vs spinule

prickle

noun
  • A tingling sensation of mild discomfort. 

  • A kind of willow basket. 

  • A small, sharp pointed object, such as a thorn. 

verb
  • To feel a prickle. 

  • To cause (someone) to feel a prickle; to prick. 

spinule

noun
  • A minute spine. 

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