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

For ClOF (Chlorine hypofluorite)

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) 6-311+G(3df,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(D+d)Z cc-pV(T+d)Z aug-cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ aug-cc-pCVTZ
Moller Plesset perturbation MP2=FULL -0.000201 -0.008052 -0.015496 -0.004815 -0.014719 -0.014719 -0.016139 -0.086410 -0.086410 -0.032358 -0.141077 -0.061206 -0.010134 -0.058293 -0.123254 -0.011894 -0.063417 -0.124898 -0.062103 -0.129270 -0.134289 -0.288354 -0.444659 -0.445319
MP3=FULL         -0.013423   -0.014804       -0.139206 -0.060813 -0.008981 -0.056265         -0.059004 -0.126011 -0.131251 -0.289844 -0.445122 -0.445774
MP4=FULL   -0.007367     -0.013560       -0.086639   -0.140490   -0.009078 -0.056922   -0.010806 -0.062174   -0.059310 -0.127251 -0.132430 -0.290402 -0.447710 -0.448303
B2PLYP=FULL -0.000059 -0.002394 -0.004623 -0.001428 -0.004364 -0.004364 -0.004779 -0.024623 -0.024623 -0.009522 -0.040578 -0.017537 -0.003012 -0.017061   -0.003533 -0.018511   -0.018104 -0.037561 -0.038978 -0.081604 -0.126054 -0.126249
Quadratic configuration interaction QCISD(T)=FULL         -0.013489           -0.140153   -0.009030 -0.056750   -0.010743 -0.062015   -0.059199 -0.126910 -0.132103 -0.290243 -0.447040 -0.447637
Coupled Cluster CCSD=FULL         -0.013209         -0.029738 -0.138538 -0.060511 -0.008784 -0.055775 -0.121634 -0.010459 -0.061044 -0.123281 -0.058611 -0.125414 -0.130600 -0.288956 -0.443654 -0.444210
CCSD(T)=FULL         -0.013492           -0.140132 -0.061169 -0.009031 -0.056745 -0.123391 -0.010740 -0.062011 -0.125029 -0.059200 -0.126899 -0.132094 -0.290236 -0.447003 -0.447609
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(D+d)Z cc-pV(T+d)Z aug-cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ aug-cc-pCVTZ