Use something like this
https://www.61financial.com.au/en-au/info/shortingFor MSB, it's 27 days to cover, based on average volume.
But, that assumes 100% of the traded volume goes to closing the outstanding short positions.
So at best case, it would be 50% of traded volume can be used to close out short positions - so already you are up to 54 trading days
That would be close of 3 months of absolutely bewdiful days
Now think about it, if significant news was to kick in - how many additional big buyers would there be?
So this 3 months estimate could likely be SI's 3 months and we know how long a "few weeks" can be
(20min delay)