bayonet vs trephine

bayonet

verb
  • To stab with a bayonet. 

  • To compel or drive by the bayonet. 

noun
  • A pin which plays in and out of holes made to receive it, and which thus serves to engage or disengage parts of the machinery. 

  • A pointed instrument of the dagger kind fitted on the muzzle of a musket or rifle, so as to give the soldier increased means of offence and defence. Originally, the bayonet was made with a handle, which needed to be fitted into the bore of the musket after the soldier had fired. 

trephine

verb
  • To perforate with a trephine. 

  • To use a trephine during surgery. 

noun
  • A surgical instrument with a cylindrical blade used to remove a circular section of tissue, f.e. bone or cornea; a trepan. 

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