This is the 1044th most frequent Spanish word.
década
A period of ten years.
Here, 'década' is used in its literal meaning, referring to a ten-year time period.
En la última década, hemos visto un crecimiento significativo en la tecnología.
In the last decade, we have seen a significant growth in technology.
In this sentence, 'década' emphasizes the duration of ten years as a continuous block of time.
Durante una década completa, trabajó para mejorar las condiciones laborales.
For a full decade, he worked to improve working conditions.
'Década' in this example is used in an idiomatic expression to describe a specific economic situation lasting ten years.