"lo these many years" is a phrase that is correct and usable in written English. It is often used to express something that has been happening for a very long time. For example: "My family has lived in this small town lo these many years.".
It sounds like a lot, given that people have been crossing these streets mostly without incident all by themselves lo these many years.
I have a specific example that illustrates my point: France in the 1920s, which I wrote about in my dissertation lo these many years ago.
The one thing that our political system has proven incapable of doing, lo these many years, is actually following through on spending cuts of any scope or magnitude.
As long as Hamas and the Assad regime are in place, the peace process is going nowhere, just as it's gone nowhere for lo these many years.
Is the idea that the first post-Romney Democratic president would, lo those many years, finally take Mr Obama's chastening to heart?
Running ads about the effects of deprivation "was a strategy that worked well for us lo those many years," said Steve James, executive director of the milk board in San Clemente, Calif.
Not DivX the codec, but DIVX as in Digital Video Express — from Circuit City — the ill-fated self-destructing DVD system from lo those many years ago.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK