Is there a database that keeps track of monster of the week vs. mythology episodes for popular shows?

The terms monster of the week episode and mythology episode started back in the late 90s with the X-files. To define the terms for those who didn’t watch X-files, the mythology episodes were more about a long arc and focused on the main characters’ stories. The monster of the week is more about that particular week’s mystery or adventure.

I tend to like the monster of the week episodes better than the long story building mythology arcs, especially when the latter involve the death of a favorite character. I’m wondering if anyone has taken the time to put together a database breaking down the episodes of popular long running shows into the two types. Any suggestions? If it helps, NCIS is the particular show I’m wondering about.