expression, adverb
within minutes; in a few minutes
Used to indicate that something will happen or be completed in a short time, typically within a few minutes. Often appears in instructions, announcements, or descriptions of quick processes.
数分以内に戻ります。
I'll be back within a few minutes.
この薬は数分以内に効き始めます。
This medicine starts working within minutes.
Compound of 数分 (a few minutes) + 以内 (within, inside). The phrase follows standard Sino-Japanese word formation patterns.