My experiences with this suggest that “long” spans of time (weeks->years) follow the “smaller percentage of your life” principle. However, occasions “in the moment” get perceived according to the rules applicable for that moment:

- boring things: usually a slow dirge or filled with brief distractions

- novel things: either no sense of time passing, or a feeling of time going anywhere from slowly to “endless”

- mundane things: time passes “at a familiar rate”, but I remember fee details later