+ (-le了) + complement of frequency + (le了)
Specifying how many times the object has been or is to be dealt with.
Tā bǎ zhèi ge zì chāo-le shí biàn, háishì jìbúzhù. 她把这个字抄了十遍,还是记不住。 She copied this character ten times, but she still can't remember it.
Wǒmen yǐngjīng bǎ zhèi ge wèntí tǎolùn-le sān cì le. 我们已经把这个问题讨论了三次了。 We have already discussed this issue three times up to now.
Bǎ zhè piān kèwén niàn sān biàn. 把这篇课文念三遍。 Read the text aloud three times.
Bǎ zuòyè jiǎnchá yíxià. 把作业检查一下。 Check your homework.
Note: Yíxià一下(a little bit) is a special verbal measure word. It is generally used to soften the tone in imperative sentences. It is not used to indicate the frequency of an action. So it is wrong to say, 'bǎ zuòyè jiǎnchá liǎng xià' 把作业检查两下(check the homework twice).