Is there daily limit on whois and nslookup?

Many website only allow a limited number of whois and nslookup.

I wonder from a shell enviroment to do such things like

nslookup somedomain.com
or
whois somedomain.com

Will the whois server allow limited queries per day?

I know the ns server most likely does not have a limit.

By the way, which is faster among nslookup and whois? I am trying to look for unregistered domains from a list of names and snap deleted domains.

 

 

 

 

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