089 Units of measurement, legal and conventional 单位 (dānwèi)

seconds
period of time (may be months, or mere seconds)

30 秒 [-] miǎo (second) seconds: 三~钟 three seconds '
19 工夫 [-] gōngfū (work-time) period of time (may be months, or mere seconds): 几天~ a couple of days || 一会儿~ a few moments || 花了很多~ spend some solid time '

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