at a time
► if something happens for days, weeks, months, etc. at a time, it continues for the whole of that period: »
Computer viruses are capable of crippling large companies, often for days at a time.
► in groups or amounts of a particular number: »
Guest designers - as many as 100 at a time - have been invited to work with resident designers.
Main Entry: ↑time
Financial and business terms. 2012.