fledge vs tuft

fledge

verb
  • To decorate with feathers. 

  • To grow, cover or be covered with feathers. 

  • To complete the last moult and become a winged adult insect. 

  • To care for a young bird until it is capable of flight. 

tuft

verb
  • To provide or decorate with a tuft or tufts. 

  • To form into tufts. 

  • To secure and strengthen (a mattress, quilt, etc.) with tufts. This hinders the stuffing from moving. 

  • To be formed into tufts. 

noun
  • A bunch of feathers, grass or hair, etc., held together at the base. 

  • A small clump of trees or bushes. 

  • A gold tassel on the cap worn by titled undergraduates at English universities. 

  • A person entitled to wear such a tassel. 

  • A cluster of threads drawn tightly through upholstery, a mattress or a quilt, etc., to secure and strengthen the padding. 

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