Timing is the skill or action of judging the right moment in a situation or activity at which to do something.
His photo is a wonderful happy moment caught with perfect timing.
他的照片抓拍的时机掌握得非常好,拍下了完美的开心瞬间。
Timing is used to refer to the time at which something happens or is planned to happen, or to the length of time that something takes.
They had concerns about the timing of the report.
他们担心这个报道的时间安排。