an intervening period
interlude - interval
The word ‘interlude’ was initially used exclusively to refer to a musical or dance composition inserted between the parts of a longer performance, such as a play or concert. It has since been adapted to also describe a brief period of time between two events or situations, during which something different happens.
After a two-year interlude during which I went travelling, I returned to finish my degree at the university.
The lengthy play was broken up by a number of musical interludes which I found to be a pleasant and diverting change of pace.
Other than a brief interlude for food, we spent the whole night working to complete the task before the allotted deadline.