Etymology
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time-span (n.)

also timespan, 1897, from time (n.) + span (n.1).

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give-and-take (n.)

1769, originally in horse-racing, referring to races in which bigger horses were given more weight to carry, lighter ones less; from give (v.) + take (v.). General sense attested by 1778. Give and take had been paired in expressions involving mutual exchange from c. 1500. Give or take as an indication of approximation is from 1958.

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small-time (adj.)

1910, originally theater slang for lower-salaried circuits, or ones requiring more daily performances; from noun phrase (also 1910). Compare big time.

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play-time (n.)

also playtime, 1660s in the recreational sense, from play (n.) + time (n.).

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run-time (n.)

"length of time taken in a particular task," 1974, originally in computing; see run (v.) + time (n.). In computing, run (n.) "instance of execution of a program" is by 1946.

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big time (n.)

"upper reaches of a profession or pursuit," by 1909 in vaudeville slang. As an adjective by 1915. The same phrase was common in colloquial use late 19c.-early 20c. in a broad range of senses: "party, shindig, fun, frolic."

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full-time (adj.)

also fulltime, 1895; full-timer is attested from 1855, in reference to students; see full (adj.) + time (n.).

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time-keeper (n.)

also timekeeper, 1680s, from time (n.) + keeper.

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time-server (n.)

"one who adapts his manners and opinions to the times," 1580s, from expression serve the time "shape one's views to what is in favor" (1550s), translating Latin tempori servire. See time (n.) + serve (v.).

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two-time (v.)

"to deceive, cheat, betray," 1924, perhaps from notion of "to have two at a time." An earlier reference (1922) in a Kentucky criminal case involves a double-cross or betrayal without a romance angle. Related: two-timing (adj.); two-timer.

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