You’ve seen me use Google Ngram Viewer output before to make points about eggcorns, adverbs, and ingenuity. Earlier this month, the tool got a few welcome upgrades. You can now conduct case-insensitive searches, find all the inflections at once, and use wildcards.
Case insensitivity: Now, instead of searching separately for aids, Aids, and AIDS, you can toggle back and forth between having them combined and separated.
The same logic applies to adjectives like tall, taller, and tallest.
Wildcards: Want to know which Kings are most often mentioned in books over time? Now you can, simply by adding a noun wildcard.