Adverbs of Frequency

[Atlas lion]

1-Can we replace adverbs of frequency such as:rarely,seldom and sometimes by the adverb"occasionally" and:often,usually and always by"generally"?
2-What is exactly the difference between "rarely" and "seldom"?

[sarat_106]

1-Can we replace adverbs of frequency such as:rarely,seldom and sometimes by the adverb"occasionally" and:often,usually and always by"generally"?
2-What is exactly the difference between "rarely" and "seldom"?

1. yes you can do so
2. There is basically no difference, they are interchangiable.