errantry's Usage Examples:

In medieval Europe, knight-errantry existed in literature, though fictional works from this time often were.

Massenet to a French libretto by Jules Claretie based on the Spanish knight-errantry romance Amadis de Gaula, originally of Portuguese origin, by Garci Rodríguez.

It is a story of knight-errantry, in which the protagonist Yvain is first rejected by his lady for breaking.

by Jean-Baptiste Lully in 1684, which in turn, was based on the knight-errantry romance Amadis de Gaula (1508).

these tales were also multiplied, and used to introduce scenes of knight-errantry and tournaments.

to sum up the spirit of knight-errantry in four lines.