several vs stand-alone

several

adj
  • Separable, capable of being treated separately. 

  • A number of different; various. 

adv
  • By itself; severally. 

det
  • Consisting of a number more than two but not very many. 

noun
  • Each particular taken singly; an item; a detail; an individual. 

stand-alone

adj
  • Operating, functioning, or existing without additions or assistance; independent; able to be separate or separated. 

noun
  • A device that can operate on its own, rather than as an accessory for another device. 

  • Something that is not a part of some series or sequence. 

How often have the words several and stand-alone occurred in a corpus of books? (source: Google Ngram Viewer )