pseudonym vs tag

pseudonym

noun
  • A fictitious name (more literally, a false name), as those used by writers and movie stars. 

tag

noun
  • A person's name. 

  • Graffiti in the form of a stylized signature particular to the artist. 

  • Something mean and paltry; the rabble. 

  • A sheep in its first year. 

  • The last line (or last two lines) of a song's chorus that is repeated to indicate the end of the song. 

  • Any short peptide sequence artificially attached to proteins mostly in order to help purify, solubilize or visualize these proteins. 

  • A children's chasing game in which one player (known as "it") attempts to touch another, who then becomes "it". 

  • An instance of touching the baserunner with the ball or the ball in a gloved hand to rule him "out." 

  • The last scene of a TV program, often focusing on the program's subplot. 

  • Any slight appendage, as to an article of dress; something slight hanging loosely. 

  • A type of cardboard. 

  • A keyword, term, or phrase associated with or assigned to data, media, and/or information enabling keyword-based classification; often used to categorize content. 

  • The end, or catchword, of an actor's speech; cue. 

  • A small label. 

  • A skin tag, an excrescence of skin. 

  • An attribution in narrated dialogue (eg, "he said") or attributed words (e.g. "he thought"). 

  • A vehicle number plate; a medal bearing identification data (animals, soldiers). 

  • A dangling lock of sheep's wool, matted with dung; a dung tag. 

  • A decoration drawn over some Hebrew letters in Jewish scrolls. 

  • A metallic binding, tube, or point, at the end of a string, or lace, to stiffen it. 

  • A piece of markup representing an element in a markup language. 

verb
  • To mark (something) with one’s tag. 

  • To label (something). 

  • To remove dung tags from a sheep. 

  • To put a runner out by touching them with the ball or the ball in a gloved hand. 

  • To follow closely, accompany, tag along. 

  • To catch and touch (a player in the game of tag). 

  • To fit with, or as if with, a tag or tags. 

  • to have sex with someone (especially a man of a woman) 

  • To fasten; to attach. 

  • To mark with a tag (metadata for classification). 

  • To hit the ball hard. 

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