Constant
Routine
noun
The constant normal things in your life are just that, constant. If you normally always do them, then they're also probably a part of your everyday routine.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
このシステムで部屋の温度を恒常に保っています。
With this system we can consistently keep it at room temperature.