flocking vs heed

flocking

noun
  • The process of adding small particles to a surface for the sake of texture. 

  • A material textured in this way, such as the artificial snow of a Christmas tree. 

heed

verb
  • To mind; to regard with care; to take notice of; to attend to; to observe. 

noun
  • Careful attention. 

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