diacritic vs nametag

diacritic

noun

  • A special mark added to a letter to indicate a different pronunciation, stress, tone, or meaning. 

adj

  • distinguishing 

  • Denoting a distinguishing mark applied to a letter or character. 

nametag

noun

  • A tag with one's name inscribed on it. 

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