dominant vs mainline

dominant

adj
  • Predominant, common, prevalent, of greatest importance. 

  • Ruling; governing; prevailing 

  • Being the dominant 

  • Preferred and used with greater dexterity than the other, as the right hand of a right-handed person or the left hand of a left-handed one. 

  • Designating the follicle which will survive atresia and permit ovulation. 

noun
  • The fifth major tone of a musical scale (five major steps above the note in question); thus G is the dominant of C, A of D, and so on. 

  • The triad built on the dominant tone. 

  • A gene that is dominant. 

  • The dominating partner in sadomasochistic sexual activity. 

  • A species or organism that is dominant. 

mainline

adj
  • Normal, principal or standard. 

  • Of or pertaining to the principal route or line of a railway. 

  • Of or pertaining to a surface railway as distinct from an underground, elevated or light rail one. 

  • Of a sequence of opening moves: being part of a main line ("a standard sequence of opening moves considered to be best play"). 

verb
  • To integrate (code, etc.) into the main repository for a software project, rather than separate forks. 

  • To inject (a drug) directly into a vein. 

  • To consume voraciously. 

noun
  • In longline fishing the central line to which the branch lines with baits are attached. 

  • An airline's main operating unit, as opposed to codeshares or regional subsidiaries. 

  • The principal route or line of a railway. 

  • A principal vein into which a drug can be injected. 

  • The main repository for a software project, from which different versions (forks) may be split off. 

  • The pipeline carrying wastewater to the public drains or a septic tank. 

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