There are multiple correct and natural choices.
... in the last 6 months
... over the last 6 months
... during the last 6 months
... for the last six months
8 de marzo de 2021
1
1
1
I would prefer to say something like that for this case:
I haven't read a book for 6 months, I need to catch up on reading.
8 de marzo de 2021
0
1
0
Over the last 6 months is correct🌷
9 de marzo de 2021
0
0
0
First phrase is good. Not the second
8 de marzo de 2021
0
0
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!