boom box vs send out

boom box

noun
  • A powerful portable audio system for listening collectively to recorded or broadcast sound. 

send out

noun
  • A networking broadcast transmission. 

  • A send off; a farewell celebration. 

  • A shout out; an appreciative public mention of someone. 

verb
  • To issue, dispatch or transmit. 

How often have the words boom box and send out occurred in a corpus of books? (source: Google Ngram Viewer )