felt vs felt-tip pen

felt

noun
  • A felt-tip pen. 

  • A cloth or stuff made of matted fibres of wool, or wool and fur, fulled or wrought into a compact substance by rolling and pressure, with lees or size, without spinning or weaving. 

  • A hat made of felt. 

adj
  • That has been experienced or perceived. 

verb
  • To cover with, or as if with, felt. 

  • To cause a player to lose all their chips. 

  • To make into felt, or a feltlike substance; to cause to adhere and mat together. 

felt-tip pen

noun
  • A pen that holds quick-drying ink conveyed to a writing surface by means of a felt nib. 

How often have the words felt and felt-tip pen occurred in a corpus of books? (source: Google Ngram Viewer )