V-shaped vs lanceolate

V-shaped

adj
  • Shaped like the letter V; especially, designating one of the two major types of valley (the other being U-shaped), typically formed by flowing water. 

lanceolate

noun
  • Any such artefact 

adj
  • Of a class of knapped stone points, made without a stem, shoulders, notches, or other features that aid in attachment to a shaft. 

  • Having the general shape of a lance; much longer than wide, with the widest part lower than the middle and a pointed apex. 

How often have the words V-shaped and lanceolate occurred in a corpus of books? (source: Google Ngram Viewer )