bidder vs write-in

bidder

noun

  • One who commands or orders 

  • Someone who bids (all senses), but most commonly, one offers to pay a specified price at an auction 

write-in

adj

  • Pertaining to a write-in. 

noun

  • A candidate whose name is not listed on the ballot. 

  • A vote made for a candidate of this kind. 

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