ALWAYS=1. at all times: used to indicate that something happens or is done continuously, repetitively, or on every occasion
She's always very polite.
2. through all past or future time: throughout all past time or all future time, or for as long as anyone can remember and as long as anyone can foresee
I will always love you.
3. if necessary: if necessary, or if there is no other or no better option
I could always stay an extra day if you need help.
OFTEN=frequently: at short intervals or repeatedly