Hour of day of day of week effects

Hi, I apologise if I have missed this but I can't find a way to assess for hour of day by day of week effects. Your programme will look at day of week and hour of day but not hour of day per day of week. I.e. If Friday at 5pm is a particularly bad or good patch then this won't be identified unless it is the same each day. Have I got this right or is this doable? Apologies if I've missed something, I'm very much a novice.

Thanks

Chris