line up vs slot in

line up

verb
  • To put things in a line 

  • to put in alignment; to put in correct adjustment for smooth running 

  • To start a game in a certain position on the playing field. 

  • To make arrangements for an event. 

  • To support a group or movement. 

  • To get into a line. 

  • To agree or correspond. 

slot in

verb
  • To put something into a slot. 

  • To put something into its desired place 

  • To schedule something for a particular time. 

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