i'll try to explain this to ya in simplistic boom bap terms
the kick and snare, 'boom bap boom bap' are all 1/4ths notes. boom bap boom bap makes 1 bar, hence 4/4
then, boom hat snare hat boom hat snare hat would make the hats the 1/8ths
then, like with fast hihats on modern music you got something like boom hat hat hat snare hat hat hat, making the hat in between the 16ths.. the 16ths will determine the groove/swing on a beat. if you chop some samples right you will have more control over that, manipulating it into your own rhythm/groove if that makes a little more sense to you.