This is the 539th most frequent Finnish word.
tapahtumia
"Events"
In this sentence, 'tapahtumia' serves as the plural partitive form, denoting various individual historical occurrences included in the book's content.
Tietokirja sisältää mielenkiintoisia historiallisia tapahtumia.
The nonfiction book contains interesting historical events.
Here, 'tapahtumia' refers to observed incidents that the subject perceives, illustrating its use to describe multiple discrete occurrences.
Oppilas havaitsi useita kummallisia tapahtumia koulun pihalla.
The student noticed several strange events in the school yard.
Here, "tapahtumia" refers to notable occurrences or incidents from the past that are important for understanding history.