If you want to create a strong password... don't you just roll some dice and pick them from a wordlist?

The EFF long wordlist is 7776 words so.... roll 6 words with dice from toy store store and that's around 77 bits.

"A nation state actor like the NSA may be able to perform quadrillions/second. Conservatively assuming a professional adversary can guess passwords at the rate of a 1,000,000,000,000 keys/second (Edward Snowden suggests being prepared for a Trillion guesses per second), an exhaustive brute-force search on 50% of the total keyspace might take:

~110,536,959,860 seconds

~1,842,282,664 minutes

~30,704,711 hours

~1,279,363 days

~3,505 years"

That's a long time