Typically, I use the GUI version of wireshark to see how to specify the read filter, then use tshark at the command line to make use of all the CLI goodness of Unix.

Display NFS_LOOKUP Calls

 tshark -R "nfs.procedure_v3 == 3" -r sometracefile.trc

Display NFS_GETATTR Calls

 tshark -R "nfs.procedure_v3 == 1" -r sometracefile.trc

Display NFS_SETATTR Calls

 tshark -R "nfs.procedure_v3 == 2" -r sometracefile.trc

Display NFS_ACCESS Calls

 tshark -R "nfs.procedure_v3 == 4" -r sometracefile.trc

…
Display NFS_LINK Calls

 tshark -R "nfs.procedure_v3 == 15" -r sometracefile.trc