Testing whether tabindex="-1" and aria-hidden="true" will hide an iFrame from Screen Readers

Why would there be such iframes?! Well, I learned recently that people like to use them for behind-the-scenes coding, but they are not supposed to be part of the user interface.

iFrames without any code to hide them from screen readers

Frame A: Without a Title

Frame B: With a Title

iFrames with tabindex="-1" and aria-hidden="true"

Frame C: Without a Title

Frame D: With a Title