back vs in the old days

back

verb
  • To go in the reverse direction. 

  • To lay out a second, smaller anchor to provide additional holding power. 

  • To push or force backwards. 

  • To adjoin behind; to be at the back of. 

  • To support. 

  • To stand still behind another dog which has pointed. 

  • To brace the yards so that the wind presses on the front of the sail, to slow the ship. 

  • To change direction contrary to the normal pattern; that is, to shift anticlockwise in the northern hemisphere, or clockwise in the southern hemisphere. 

  • To make a back for; to furnish with a back. 

  • To write upon the back of, possibly as an endorsement. 

  • To sign or endorse (a warrant, issued in another county, to apprehend an offender). 

  • To draw from behind the back [+accusative = a knife etc.] (as also back out). 

  • To row backward with (oars). 

  • To carry an infant on one's back. 

noun
  • Effort, usually physical. 

  • The reverse side; the side that is not normally seen. 

  • The keel and keelson of a ship. 

  • A large shallow vat; a cistern, tub, or trough, used by brewers, distillers, dyers, picklers, gluemakers, and others, for mixing or cooling wort, holding water, hot glue, etc. 

  • The part of something that goes last. 

  • The spine and associated tissues. 

  • The backrest, the part of a piece of furniture which receives the human back. 

  • A ferryboat. 

  • The roof of a horizontal underground passage. 

  • Large and attractive buttocks. 

  • The inside margin of a page. 

  • The edge of a book which is bound. 

  • In some team sports, a position behind most players on the team. 

  • A support or resource in reserve. 

  • The rear of the body, especially the part between the neck and the end of the spine and opposite the chest and belly. 

  • A non-alcoholic drink (often water or a soft drink), to go with hard liquor or a cocktail. 

  • Among leather dealers, one of the thickest and stoutest tanned hides. 

  • Area behind, such as the backyard of a house. 

  • The side of a blade opposite the side used for cutting. 

  • The side of any object which is opposite the front or useful side. 

  • That which is farthest away from the front. 

  • The part of a piece of clothing which covers the back. 

  • Upper part of a natural object which is considered to resemble an animal's back. 

adj
  • Pronounced with the highest part of the body of the tongue toward the back of the mouth, near the soft palate (most often describing a vowel). 

  • Not current. 

  • Situated away from the main or most frequented areas. 

  • At or near the rear. 

  • Returned or restored to a previous place or condition. 

  • Moving or operating backward. 

  • In arrears; overdue. 

postp
  • Before now; ago. 

adv
  • In a direction opposite to the usual or desired direction of movement or progress, physically or figuratively. 

  • So as to reverse direction and return. 

  • Away from someone or something; at a distance. 

  • Away from the front or from an edge. 

  • In a manner that impedes. 

  • In a reciprocal manner; in return. 

  • So as shrink, recede or move aside, or cause to do so. 

  • To a later point in time. See also put back. 

  • Towards, into or in the past. 

  • To or in a previous condition or place. 

  • Earlier, ago. 

  • In a direction opposite to that in which someone or something is facing or normally pointing. 

in the old days

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