guttate vs stained

guttate

adj
  • Spotted. 

  • Shaped like, or resembling drops. 

verb
  • To exude drops of xylem sap on the edges of leaves. 

stained

adj
  • having a stain 

  • coloured by adding a pigment 

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