javelin vs spontoon

javelin

noun
  • A light spear thrown with the hand and used as a weapon. 

  • A metal-tipped spear thrown for distance in an athletic field event. 

verb
  • To pierce with a javelin. 

spontoon

noun
  • A pointed weapon similar to a pike. 

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