There's a song where one bar of the verse sounds like it's in 4/4 time and the next bar sounds like it's in 3/4 so it sounds like the verse just alternates between 4/4 and 3/4 but I wanted to know what time signature this is since I assume it doesn't just constantly switch back and forth (for clarification it goes 1 2 3 4 | 1 2 3 | 1 2  3 4 |)
whoever writes it down gets to decide. it depends which way you think is easier to read. you can say 7/4 if you don't mind your bars being huge. you can make the bars reasonable size if you don't mind writing 4/4 then 3/4 etc. at the beginning of every bar. or, what i've actually seen, is you can write something like 4/4 + 3/4, at the beginning. and that means that it alternates. that's probably what i might do. OR, another option is to use 7/4 and put a dotted bar line in the middle of each bar to split it up the way you counted it