The phrase 'since often' is correct and usable in written English.
You can use it to emphasize how frequently something occurs or has happened over a certain period of time. Example: We have been getting a lot of rain since often lately.
The government has periodically handed out the honour since, often in conjunction with a royal celebration.
Palladio celebrated the supremacy of reason in his designs, adapted worldwide during the centuries since, often for secular contexts.
However, sensors continue to be considered the weak link in many engineering applications since often they are less reliable than the system they are observing.
In many practical situations, this assumption may not be tenable since often one studies only a sample of inbred lines from a possibly large (hypothetical) population.
But those numbers do not reflect the scale of the fraud rings, the report said, since often the ringleaders are the only ones prosecuted.
He retired from Kitt Peak in 1995 and has worked full time for the I.D.A. ever since, often putting in sixty-hour workweeks.
The day after the program was broadcast the place was filled, and it has been ever since, often with officials and celebrities.
Throughout the 2000s there was a lot of cross-border shopping, most of it one way, since often in those years the euro was strong and sterling weak.
You've got to fight it.' " Many cases of breakups by same-sex couples involve adoption laws, since often, at least one parent has adopted the child.
Kahn, meanwhile, moved into her black 1995 Camry station wagon – where she has been sleeping ever since, often stationed in Walmart parking lots.
A number of his pieces have received their first performances here since, often when his music was otherwise ignored in Britain.
