instruction vs user guide

instruction

noun
  • A set of directions provided by a manufacturer for the users of a product or service. 

  • An instance of the information or knowledge so furnished. 

  • The act of instructing, teaching, or furnishing with information or knowledge. 

  • An order or command. 

  • A single operation of a processor defined by an instruction set architecture. 

user guide

noun
  • A manual intended to assist in the use of a particular system. 

How often have the words instruction and user guide occurred in a corpus of books? (source: Google Ngram Viewer )