flavescent vs sallow

flavescent

adj
  • yellow-ish in colour, or turning yellow 

sallow

adj
  • Having a similar pale, yellowish colour. 

  • Of a sickly pale colour. 

  • Foul; murky; sickly. 

  • Of a tan colour, associated with people from southern Europe or East Asia. 

  • Having skin (especially on the face) of a sickly pale colour. 

verb
  • To become sallow. 

  • To cause (someone or something) to become sallow. 

noun
  • A European willow, Salix caprea, that has broad leaves, large catkins and tough wood. 

  • A willow twig or branch. 

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