i’d probably call that 8/4. you can count to 8 before the pattern more or less repeats.

the top number is how many clicks of the metronome is in each measure (a little chunk to organize the music and keep everything even)

the bottom number has more to do with how a composer writes the music down, and is less something you can hear. there does tend to be “usual” time signatures, so without seeing the sheet music, you generally just assume the bottom number.

basically the most common in western music is 4/4 because a measure is 4 quarter notes long. thats basically why they call them quarter notes too.

jazz guys and prog rock might do some more complex stuff like 5/8 or 7/8. a good example of 7/8 in pop music is money by pink floyd. listen along and count to 7 and youll hear the line repeat.