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Jyutping saam1 tin1 loeng5 tau4
Pinyin sān tiān liǎng tóu

Definitions (CC-CEDICT)
  1. lit. twice every three days (idiom); practically every day
  2. frequently
Definitions (Wiktionary)
  1. phrase, idiomatic
    every two or three days (something bad happens); almost everyday
    (syn.) 三头两日, 三頭兩日
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    最近三天两头下雨。
    最近三天兩頭下雨。
    zuì jìn sān tiān liǎng tóu xià yǔ 。
    • It has been raining constantly lately.
Examples (Wiktionary)
  1. Mandarin
    这条路三天两头的挖,坑坑洞洞的,真是寸步难行。政府种种严谨的法律,使得不肖的生意人,大叹寸步难行,再也不能任意剥削了。
    這條路三天兩頭的挖,坑坑洞洞的,真是寸步難行。政府種種嚴謹的法律,使得不肖的生意人,大嘆寸步難行,再也不能任意剝削了。
    zhè tiáo lù sān tiān liǎng tóu de wā , kēng kēng dòng dòng de , zhēn shì cùn bù nán xíng . Zhèngfǔ zhǒng zhǒng yán jǐn de fǎ lǜ , shǐ dé bù xiào de shēng yì rén , dà tàn cùn bù nán xíng , zài yě bù néng rèn yì bō xuē le .
    • They have been digging up this road for the last several days and it is full of potholes. It is really difficult to move forward.
      All kinds of strict government laws make it so that unscrupulous business people lament the fact that it is difficult for them to make headway. They can no longer prey on people at will