분 has two uses as a counting word. 1. respectful version of 명 or 사람, like "gentlemen" or "lady" but without referring to the gender. e.g. 일행이 몇 분이세요 = How many people are there in your party? (more respectful than 몇 명/사람이세요?) 분 also makes pronouns like 이분 (this gentleman/lady), 저분 (that gentleman/lady), 그분들 (Those ladies and gentlemen), etc. 2. suffix referring to a specific apportioned quantity (usually follows a word describing the amount) - 1인분 = quantity for one person (as of food). - 30일분 = a quantity to last 30 days. - 원정대는 50일분의 식량을 준비했다 = The expedition amassed food for fifty days. * It also means "minute", as in 30분 = thirty minutes, or 12시 20분 = twelve twenty (12:20).

Thank you so so much ☺️

When Maitre D asked you "For how many people?" like "몇 분이세요?" you say "1명이에요." 분 is police/formal way (존댓말) to say counting unit. When you answer, you say 명 which is informal counting unit.