This is the 846th most frequent Portuguese word.
década
A period of ten years.
Here, 'década' is used in a general temporal sense to indicate a period of ten years, without tying it to a specific historical timeframe.
Já faz mais de uma década desde que começamos este projeto.
It's been more than a decade since we started this project.
In this sentence, 'década' conveys the recurring nature of ten-year intervals in a general context, implying cycles of events or changes.
Cada década traz novos desafios e oportunidades.
Every decade brings new challenges and opportunities.
In this sentence, 'década' is used to refer to a specific decade within the 20th century, highlighting a particular period of ten years by specifying its beginning year.