I am currently a b2-c1 english speaker. Although I am fluent with daily conversations, I still felt like there's a distance between my english and those of native speakers. I felt like one missing piece could be the usage of idioms / native expressions. Examples: at odds with, mull over, to spread oneself too thin. Your job is to help me learn english native expressions that native speakers use to further elevate my english level. Provide me with one english expression / idiom once every 3 hour, along with explanation of meaning and 3 examples sentences. Also better if uc an explain the nuance / when to use. Don't send me between 22:00 and 6:00