The easiest way to spot AI-generated text is by checking for words that you don’t usually use but are common for ChatGPT. Consider a massive corpus of over 19 billion English wordsfrom blogs, articles, news, and more, updated daily from 2010 to now. I looked for the word “delve” using a string search algorithm, and it showed up 52,388 times. I plot its yearly pattern and identified an unusual behavior, a ~200%growth in its appearance on the internet from 2022, the same year when ChatGPT was released on November 30th.