[at a premium] {adv. phr.} At a high price due to […]

[at a set time] {prep. phr.} At a particular, pre-specified time. […]

[at a snail's pace] See: [SNAIL'S PACE].

[at a straw] See: [GRASP AT STRAWS].

[at a stroke] See: [AT A BLOW] or [AT A STROKE].

[at a time] {adv. phr.} At once; at one time; in […]

[at all] {adv. phr.} At any time or place, for any […]

[at all costs] {adv. phr.} At any expense of time, effort, […]

[at all events] See: [IN ANY CASE].

[at all hazards] {adv. phr.} With no regard for danger; at […]