Does anyone know how to find the publishing and canvassing dates for a particular directory?

I'm seeking the death information for my wife's g-grandfather Charles Emory Garrison (b about 1866 in Ohio; d about 1905-06). I know he was alive in November 1905; his son Arthur was born in August 1906. By Dec 1906, his wife Minnie (nee Weethee) had applied for a marriage license and claimed to be widowed.

He appeared in the 1905-1906 RL Polk Columbus City Directory, but not in the 1907-08 edition.

I've searched the death indexes for 1905-1906, but I can't find him. It would help if I could narrow down the canvassing dates for the 1905-06 and the 1907-08 directory, as those are the best dates I have for narrowing down his death.

Any suggestions for trying to track this down would be helpful as well.