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Energy differences between frozen core and all electrons correlated.
MP2, MP3, MP4, B2PLYP, CCSD, and CCSD(T)

For ScO (Scandium monoxide)

Energies in Hartree
Methods with standard basis sets
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
Moller Plesset perturbation MP2=FULL -0.013562 -0.147704 -0.147704 -0.154060 -0.200571 -0.200571 -0.216073 -0.401036 -0.401036 -0.240454 -0.226026 -0.173889 -0.266674 -0.340639 -0.182178 -0.295289 -0.344379
MP3=FULL         -0.212567   -0.227110       -0.233242 -0.181458 -0.276609        
MP4=FULL   -0.157682     -0.220818       -0.426462     -0.188134 -0.292125   -0.196305 -0.317842  
B2PLYP=FULL -0.004295 -0.047032 -0.047032 -0.049417 -0.064442 -0.064442 -0.069475 -0.122951 -0.122951 -0.076516 -0.071958 -0.056260 -0.085338   -0.059006 -0.093543  
Quadratic configuration interaction QCISD(T)=FULL         -0.218458             -0.185325 -0.286713   -0.194012 -0.313015  
QCISD(TQ)=FULL         -0.219633   -0.234591         -0.187494 -0.285982   -0.196319    
Coupled Cluster CCSD=FULL         -0.212578           -0.233547 -0.181408 -0.277678 -0.354672 -0.190043 -0.303732 -0.358226
CCSD(T)=FULL         -0.218679           -0.238838 -0.185843 -0.286545 -0.366902 -0.194533 -0.312904 -0.370475
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ