at beck and call

As an assistant to a producer she remained at beck and call from 6:45 a.m. often until midnight.

Google Home is the second big bet by a technology firm that consumers crave a sort of “digital butler” ready at beck and call.

Surely not because of danger to us at the Hall, for we had our Mohawks, our militia, and yeoman tenantry at beck and call.

If a male thinks we females will run at beck and call for them, they quickly weary of such a game.

The woman had then been detected in theft and in an intrigue with one of the grooms, and had been ignominiously dismissed from service; but Flossy had chosen to seek her out and befriend her—not from any charitable motive, but because she saw in the discarded maid a person whom it might be useful to have at beck and call.