三人行，必有我师(焉)

语法
V + # + measure word for "how many times," mostly 遍, 次, and 下 (that's a new one)
https://resources.allsetlearning.com/chinese/grammar/Measure_words_for_verbs
*I was going to give the 到 with repeated verbs at the bottom of yesterday's page a day to itself, but on reflection it's really the same format, just with an extra verb in front of it. Please take a look at yesterday's link as needed.

词汇
不好意思, sorry (also "embarrassed" in some contexts) ( pinyin )
https://mandarinbean.com/new-hsk-2-word-list/
More casual "sorry" as far as I know than 对不起.
*I've skipped some of the other 不 words already covered.

Guardian:
我再重复一遍我刚才说的话, I'm going to repeat what I just said one more time
我已经给过你两次机会了，I've already given you a chance twice
不好意思，开个玩笑, sorry, it was a joke.

Me:
我昨天晚上做了三次一样的梦。
不好意思，不是故意的。