felt-tipped pen vs highlighter

felt-tipped pen

noun
  • felt-tip pen 

highlighter

noun
  • A marker pen used to highlight text. 

  • That which highlights or emphasizes something. 

  • A cosmetic product that reflects light, used to emphasize the contours of the face etc. 

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