appear unexpectedly vs turn up

appear unexpectedly

turn up

verb
  • To cause to appear; to find by searching, etc. 

  • To show up; to appear suddenly or unexpectedly. 

  • To increase the amount of something by means of a control, such as the volume, heat, or light. 

  • To reposition by rotating, flipping, etc. upwards. 

  • To party hard, especially when involving alcohol or drugs. 

  • To belay or make fast a line on a cleat or pin. 

How often have the words appear unexpectedly and turn up occurred in a corpus of books? (source: Google Ngram Viewer )