The 'request' group
These nouns refer to the fact that someone wants a particular thing to happen, or expresses their wishes.
at whim at will at my behest /at the behest of ... at my bidding /at the bidding of ... at my command /at the command of ... at my discretion /at the discretion of ... at my insistence /at the insistence of ... at my instigation /at the instigation of ... at my request /at the request of ... at my suggestion /at the suggestion of ... at my whim /at the whim of ...
It was only after three weeks, at the insistence of the family doctor, that the damaged leg was X-rayed and the fracture discovered.
Two of the dogs were later destroyed at the owner's request.
The collapse in the power of trade unions has left managers free to hire and fire pretty much at will.