14 Answers

seldom

Rare

Once in a Blue moon

Occasionally, infrequently, sporadically, uncommonly

Sex ....

Millennium!!!

presidental impeachment...ops two words

TRUE LOVE!

HUMILITY
     INTEGRITY
          HONESTY
               INTELLIGENCE
                    DEPENDABILITY
                         RESPONSIBILITY
                             
Seldom and Occasional were the two words that first came to mind.  They have been offered already.

PROTOCOL

Out of the blue.

Occasionally

seldom can be a word used to describe an event or action that rarely happens. (Rarely also is a good word) This has been answered correctly by others above. Use a thesaurus to find words that parallel words that you would like to use, this is especially helpful when producing 'official' documents such as resumes, cover-letters and other business related written material.

The shapes of the opened-up plates and bridges are remarkably harmonious for an openworked watch in fact I'd say they're remarkably harmonious link period. Hermès has also kept the high resolution moon disks from the Arceau L'Heure De La Lune watches albeit miniaturized to fit the rest of the composition and that unexpected contrasting element of link photorealism keeps the whole thing from seeming too predictable always a risk when hewing to a minimalist link aesthetic in watch design.