detain vs tamp down

detain

verb
  • To keep someone from proceeding by holding them back or making claims on their attention. 

  • To put under custody. 

  • To seize goods for official purposes. 

  • To keep back or from; to withhold. 

tamp down

verb
  • To suppress (something, usually an emotion or thought). 

  • To compact a substance (usually soil) until it is flat. 

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