"some while back" is a correct and usable phrase in written English.
You can use it to refer to an earlier period of time, usually in a past that is relatively recent but not too specific. For example: "I saw him some while back at the grocery store."
I know because that was what happened to me some while back.
Some while back, I proposed a concept that did not stick.
Kingcombe Meadows are so far off the beaten track that the track petered out some while back, but it is vaguely near the village of Maiden Newton.
But I can report on two other comparable summer openings on what was once known as the London "fringe," a word that some while back stopped doing justice to the scale and scope of the venues involved.
That is why, some while back, they sent him to a tiger reserve in India, and why they have booked him a late-summer trip to Hudson Bay in Manitoba to observe polar bears and other animals close up.
If Cyclone Sandra, whose passage down the Tasman caused the rain, had made herself obvious some while back, there can be few prognosticators before the series who saw that situation arising.
The city of Leeds got some stick a while back when it was noticed that "Leeds.
When I did a final walk-through with some buyers a while back, they found the sellers had removed every light bulb and, worse, had taken the electronic garage opener.
Another reader cuts to the chase: "Wasn't there some buzz a while back about Martha stealing her daughter's BF?" The answer: "I thought that was Erica Kane.
HTC won over some hearts a while back when it released its bootloader unlock tool for a good number of devices.
They had done some version a while back, but it was a love song, it had nothing to do with the actual meaning of this.
