attendance / attendants are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
attendance: (noun) the act of being present (at a meeting or event etc.). (noun) the frequency with which a person is present. (noun) the number of people that are present.
attendants: (noun) someone who waits on or tends to or attends to the needs of another. (noun) a person who is present and participates in a meeting.
attendance: ah·t·EH·n·d·ah·n·s
attendants: ah·t·EH·n·d·ah·n·t·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)