I count 45 if we include variations like "Windows Defender AV", "Windows Defender Security Center", etc.

Example from article : "Windows Defender ATP alert showing how detection of the Sharpshooter technique by Windows Defender AV is surfaced in Windows Defender Security Center"

And that's not including the text embedded in the images themselves - like the image of the event log ( Event 1127 - Windows Defender ).

You can't scroll through the article without a mention of Windows Defender. I don't know if they did it purposefully or not, but I'd say it was intentional. Hard to believe it was accidental.