Take A Number Meaning

(idiomatic) Recognize that many others are in the same situation; recognize that one's concerns are not of high priority; be prepared to wait.

Example: Queue; wait to be served by being assigned a number and waiting for that number to be called after all previous numbers have been served in order of assignment
1994, Stryker McGuire et al., "Sale Of The Century?," Newsweek, 12 Sep.,
  Wanna buy a television network? Take a number. A few years ago you would have had the field to yourself.
2000, Tony Karon, "Chile Exorcises the Specter of Pinochet," Time, 8 Aug.,
  Even if they did decide to prosecute, the Justice Department would have to take a number and stand in a very long line.