You say, "Una vez más," or, "Otra vez," or, "De nuevo."
"once in a blue moon" means not very often It means periodically, or we can say once in a long length of time. Again we can say, rarely. Although as I remember the saying, it goes, "Once in a blue moon." Once again it means rarely.
If you did it once, you are likely to do it again. Nope no apologies.
I felt moved once again
I always say..."Once a cheater, always a cheater." Watch out.
Click on her once to hear her say that, then click again to push
The duration of Once Upon a Time in Mexico is 1.7 hours.
Mexico City, Mexico
You say, "Él nació en Mexico."
It was once named Tenochtitlan, until the Spanish re-named it Mexico City.
Once Upon a Time in Mexico was created on 2003-09-12.
Once Upon a Time in Mexico was released on 09/12/2003.
Intentaré una vez más. Literally, "I will try once more."