This is the 369th most frequent Polish word.
ostatnio
"Recently" or "lately."
Here, 'ostatnio' is used as an adverb meaning 'lately', indicating a recent period.
Ostatnio dużo myślałem o naszej rozmowie.
Lately, I have been thinking a lot about our conversation.
In this case, 'ostatnio' means 'recently', referring to a recent encounter.
Spotkałem go ostatnio na stacji.
I met him recently at the station.
Here, 'ostatnio' is used to indicate a short time ago, reflecting a recent observation.