Unless you're storing that data, you can't.
It looks like
posts_views_count is just a running total, so unless you've stored per month/week data, it simply does not exist.
What's more, you're storing that data in a post meta value, which has a lot of performance and accuracy problems. It's:
- incompatible with any form of page caching or CDN
- creates write queries on the frontend, slowing down your site and reducing how many people can visit at the same time
- extremely innacurate due to race conditions. The view counts will be lower than they actually are
If you want to do it properly, and have per month/week data, you'll need to use an external service such as Google Analytics, or a dedicated traffic software solution.
Otherwise, to make the plugin track per week and month, you will need to contact their support routes. 3rd party plugin support is offtopic here. If it does store that data, then you'll need to contact their support routes to ask how to access it.