acinus vs vesica

acinus

noun
  • A grape-stone. 

  • One of the granular masses which constitute a racemose or compound gland, as the pancreas; also, one of the saccular recesses in the lobules of a racemose gland. 

  • One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc. 

vesica

noun
  • The vesica piscis or oval aureole in mediaeval painting. 

  • A bladder, especially the urinary bladder or the gall bladder. 

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