disc jockey vs selector

disc jockey

noun
  • A person who plays, and sometimes mixes, recorded music at nightclubs, dances, parties, or some other social event; and/or as a backup musician for spoken word, or hip hop performers. 

selector

noun
  • Someone or something which selects or chooses. 

  • An administrator responsible for selecting which players will play for a side. 

  • A matching expression in a stylesheet determining which elements in the markup are affected by a style. 

  • A text string transmitted to a Gopher server, identifying the resource to be retrieved. 

  • A person who is entitled to choose a tract of Crown land to purchase. 

  • A pointer to a structure describing a segment of memory. 

  • A disc jockey. 

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