You’ve seen the headlines or article titles online that are misleading or highly inaccurate. They tend to be similar to articles such as “Grandma Finds Shocking Surprise in Medical File Ten Years in Making” and it turns out she left a box of insurance claims in the closet where the ten-year old cat has started napping.
While titles of genealogy databases are not quite that extreme, they can suggest that the database includes regions or time periods that it does not. Make certain that the database of Oklahoma marriages between 1900 and 1925 includes the county and time period that you need. Make certain that set of digital images of newspapers includes all issues during the time frame in which you are searching and not just images of select dates.
That database may not be as complete or all-encompassing as the title would like you to believe.