off-the-shelf vs ready-made

off-the-shelf

adj
  • As purchased or as commonly available, without modification or customization. 

ready-made

adj
  • Pre-existing or made previously and suitable for use without (further) preparation or modification; comparable with regard to the amount of preparation required. 

  • Made or prepared in advance and used regularly or habitually without original thought. 

  • Made in advance to a standard specification. 

noun
  • A ready-made object. 

How often have the words off-the-shelf and ready-made occurred in a corpus of books? (source: Google Ngram Viewer )