| You could forgive him for a snit here, a tantrum there, an errant expletive in front of an impressionable young fan once in a blue moon. |
| He hardly ever went outside except to get the newspaper and, once in a blue moon, mow the lawn, and so his skin was milk-white and blue-veined. |
| Even if you only need your torch once in a blue moon, the EVERLight will be a true companion for ever. |
| He was the guy who came along once in a blue moon to save the country. |
| If Nadine only enjoys fry-ups and mash once in a blue moon and the rest of the time she follows a strict diet then she should say so. |
| You know that song that comes along once in a blue moon and takes your breath, and steals your heart, away? |
