Also, increased temperatures may require that lubricants be changed frequently

I will have to fire you if you come late so often

He makes careless mistakes, and does so frequently

The seals surface more frequently then, so a bear's chance of catching one at a breathing hole is greater after nightfall

If you frequently spit-up blood you should call an ambulance or have a nearby physician make a house call

How many times a year do you go scuba diving

I'll have to fire you if you come late so often

Refer to the dictionary as often as possible