Looking on the internet deeply has found these results:

since about ten years is the most popular phrase on the web.

since about last ten years 11 results on the web	since about ten years 1687 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
May 7, 2012 ... But since about last ten years i lost this connection but I am recovering now and confident of nondigital sabbatiocal(right word?).I hope with the ...	mediated immune responses. Nov 26, 2012 ... We have been in Bangalore since about ten years ago. Sorry, that is not correct. You can't use 'ago' with present perfect + since. Yes, time ... 2. Julie phoned ten minutes ………………………………………… 3. We have been living in this city since about ten years ……………………………………….. 4. He has been working for us since about ten years ago. Ago and for. Ago says how long before the present moment something happened. When used with a past ... peptide epitopes do play a role in classical MHC Since about ten years evidence is now accumulating that carbohydrate

since about last ten years

11 results on the web

since about ten years

1687 results on the web

More popular!

May 7, 2012 ... But since about last ten years i lost this connection but I am recovering now and confident of nondigital sabbatiocal(right word?).I hope with the ...

mediated immune responses.
Nov 26, 2012 ... We have been in Bangalore since about ten years ago. Sorry, that is not correct. You can't use 'ago' with present perfect + since. Yes, time ...
2. Julie phoned ten minutes ………………………………………… 3. We have been living in this city since about ten years ……………………………………….. 4.
He has been working for us since about ten years ago. Ago and for. Ago says how long before the present moment something happened. When used with a past ...
peptide epitopes do play a role in classical MHC
Since about ten years evidence is now accumulating that carbohydrate