aid vs sideline

aid

verb
  • To climb with the use of aids such as pitons. 

  • To provide support to; to further the progress of; to help; to assist. 

noun
  • Help; assistance; succor, relief. 

  • An historical subsidy granted to the crown by Parliament for an extraordinary purpose, such as a war effort. 

  • A helper; an assistant. 

  • An exchequer loan. 

  • Something which helps; a material source of help. 

  • A pecuniary tribute paid by a vassal to his feudal lord on special occasions. 

  • The rider's use of hands, legs, voice, etc. to control the horse. 

sideline

verb
  • To remove or keep out of circulation or out of the focus. 

  • To place on the sidelines; to bench or to keep someone out of play. 

noun
  • A line for hobbling an animal by connecting the fore and the hind feet of the same side. 

  • Something that is additional or extra or that exists around the edges or margins of a main item. 

  • Usually in the plural: the area outside the playing field beyond each sideline. 

  • The outside or perimeter of any activity. 

  • A line at the side of something. 

  • A line defining the side boundary of a playing field. Used in Canadian football, field lacrosse and basketball. 

  • A secondary road, especially a byroad at right angles to a main road. 

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