guttate vs speckled

guttate

adj
  • Spotted. 

  • Shaped like, or resembling drops. 

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

speckled

adj
  • Marked with dots or spots, spotted. 

  • Sporadically and irregularly marked. 

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