不常，很少， 难得 用英语:

My son seldom

In our country we seldom open gifts in the presence of the giver.

A fat man seldom dislikes anybody very hard or for very long.

Barter, however, was a very unsatisfactory system because people's needs seldom matched exactly.

If you always travel by subway, you seldom surface other than at your stop.

The trouble with him is that he is seldom punctual.

I was seldom able to see an opportunity until it had ceased to be one.

Such a man does not go hunting and seldom owns a gun.

Living, as I do, in the country, I seldom have visitors.

Fine words and an insinuating appearance are seldom associated with true virtue.

Advice is seldom welcome, and those who need it the most, like it the least.

People are most angry when they feel they are being mocked. That's why those who are confident in themselves seldom become angry.

It is a matter of common knowledge that a man of genius is seldom successful in his own lifetime.

My grandmother used to go out for a walk almost every day, but now she seldom, if ever, goes out.

Seldom have human beings experienced such a disaster.