* No Official Count: J.K. Rowling or any official source has not released a word count for the series.
* Varying Definitions: What constitutes "mentioned" is subjective. Does it include every instance of the word, or only specific contexts?
* Technical Limitations: Even with advanced software, precisely counting the word in all seven books would be a very time-consuming and tedious task.
However, we can confidently say that the word "mentioned" appears many times throughout the Harry Potter series, as it's a common word in English. It's likely used frequently in dialogue and narration when characters discuss or refer to events or information.