use; application; where to use
Refers to the appropriate situation, timing, or purpose for using something; often implies finding the right opportunity or context.
I don't know when to use this tool.
He really shows his strength at the crucial moment.
Most common spelling; uses hiragana for どころ.
Kanji spelling for どころ; less common but still seen.
Rare kanji form; it is rarely used.
Compound of 使い (use) and どころ (place, point, time), a voiced form of ところ. The exact historical derivation is straightforward.