The phrase "although once in a while" is correct and usable in written English.
It can be used to indicate that something happens occasionally or infrequently, often in contrast to a more regular occurrence.
Example: "I usually prefer to stay home, although once in a while, I enjoy going out with friends."
Alternatives: "every now and then" or "from time to time."
Kate Getzewich, as a shady Princess Puffer, has a powerful voice and projects excellently (although, once in a while, she sounds a bit tense).
The experience is best with friends, although once in a while you'll pick up a crew of strangers and everything will click.
This paid off in frequent invitations and relationships that were more often than not strengthened by my stays (although once in a while a frayed friendship would give way entirely under the burden of shared quarters).
I found this worked as designed pretty consistently, although once in a while two treats were dispensed instead of one, which is not really a huge issue, and probably would be described as a feature, not a bug, by my dog.
Submit them once-in-a-while.
By contrast, a neutrino can easily zip through the entire earth without hindrance, although once in a great while a neutrino may bang into an electron orbiting an atom and send the electron careening away (where a man-made detector may spot it).
The days when amateurs like Bobby Jones frequently placed high in major events is long gone, although a future star breaks through once in a while.
Both Gina and Alexandra are vegetarians, but I'm strictly carnivore, although every once in a while, they'll get me to eat a fake steak sandwich.
I'll have bacon once in a while, although it tortures me that animals are being tortured.
"I cannot escape the feeling," Dr. Feoktistov wrote, "that we were extended a helping hand once in a while, although quite inconspicuously".
Many of the Zananas accepted the fact that they used recreational drugs once in a while, although only a small number claimed of trying injectable drugs.
