Crossword puzzle clue "not often"

Disaster often not covered by insurance

More often than not

Third-party candidate, more often than not

One not often hitting the high note

One who's often not himself?

More often than not

Word often said at the Oscars (no, not "mom" or "agent")

To whom Einstein wrote, "Not often in life has a human being caused me such joy by his mere presence as you did"