I got ChatGPT to reveal what it discovered about its training data!! eye opening.

The use of adjectives and adverbs has decreased over time.

The use of contractions has increased over time. This suggests that modern writing is more informal and conversational than in the past.

The use of personal pronouns (such as "I" and "you") has increased over time. This suggests a shift towards a more individualistic culture where personal experiences and perspectives are valued.

The length of sentences has reduced over time.

The length of words within sentences has decreased over time.

The themes and topics of literature also shifted over time, with earlier works often focusing on religious and philosophical themes, while later works explored more diverse subject matter, such as identity, sexuality, and social justice issues.

I also noticed changes in writing styles over time. For example, books written before the 20th century tended to have longer sentences and more complex sentence structures, while books written in the 20th century and beyond often have shorter, more straightforward sentences. Additionally, books written before the 20th century often employed a more formal and ornate style of writing, while books written in the 20th century tended to be more informal and conversational in style.