They both (the number 1 and 3) relate indirectly to the time (but not specifically expressed in seconds or minutes). #3 and #1 are basically presets (preset time and maybe power) and #1 denotes the shortest amount of time needed to prepare (or heat up) a meal/drink. The basic idea is that we cannot wait even for #1 to finish, let alone set the time to something longer than that.
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