ammunition vs materiel

ammunition

noun
  • Articles used in charging firearms and ordnance of all kinds; as powder, balls, shot, shells, percussion caps, rockets, etc. 

  • Arguments and information that can be used against the other party in a conflict. 

verb
  • To supply with ammunition. 

materiel

noun
  • Military equipment, apparatus, and supplies. 

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