This is a wordle showing the primary and secondary MRCLASSes of our papers since 2014, according to MathScinet, with size proportional to the logarithm of the absolute frequency:
These are the actual distinct MRCLASSes in separated lists:
Primary: 00A05, 01A70, 05C15, 05C31, 05C50, 05C63, 05C80, 11A05, 11A07, 11A41, 11A51, 11B05, 11B13, 11B30, 11B75, 11B83, 11D09, 11F30, 11F41, 11F67, 11F72, 11H06, 11J70, 11K65, 11L03, 11L07, 11N05, 11N32, 11N36, 11N37, 11N75, 11P21, 11P70, 11Y60, 15A24, 22E40, 26A42, 30C15, 30F30, 30H35, 33F05, 35D35, 35F45, 35J61, 35K08, 35P15, 35Q31, 35Q35, 35Q86, 35R11, 35R35, 35R60, 37A05, 37A15, 37A25, 37B99, 40A05, 42A16, 42A32, 42B10, 42B20, 42B25, 42B37, 46E35, 47A15, 51E20, 53C42, 57S20, 58C40, 58J40, 60E05, 60G50, 60H15, 60J99, 76W05, 78-01, 81Q05, 81Q35, 81T13, 81T20, 82D10, 86A08, 86A10, Expansion, Prelim.
Secondary: 00A64, 05A10, 05A15, 05A16, 05A20, 05B10, 05C15, 05C60, 05C65, 05C72, 05C80, 05D40, 05D99, 11A63, 11B13, 11B30, 11B37, 11B75, 11B83, 11C20, 11D85, 11E25, 11F03, 11F27, 11F30, 11F37, 11F72, 11G55, 11H06, 11J83, 11J86, 11J87, 11K31, 11K60, 11K70, 11L03, 11L05, 11L07, 11M06, 11M20, 11M36, 11N05, 11N35, 11N36, 11N37, 11N45, 11N64, 11P21, 11P70, 11R11, 11T23, 11T30, 11Y60, 14H55, 15A45, 15B36, 20F99, 20K01, 20K10, 20K27, 22B05, 22C05, 22E40, 22E45, 26-01, 26A15, 26A16, 26A30, 26B05, 26B12, 28A05, 28A50, 28A75, 28A78, 28A80, 28C15, 28D05, 30F35, 30H10, 33C65, 33F10, 35A01, 35B30, 35B35, 35B40, 35B44, 35B50, 35B65, 35D30, 35J05, 35J15, 35K59, 35K61, 35M12, 35M30, 35P20, 35Q31, 35Q35, 35Q41, 35Q51, 35Q53, 35Q55, 35Q82, 35Q86, 35R01, 35R11, 35R60, 35S10, 37A05, 37A35, 37A45, 37A46, 37A99, 37D40, 39A60, 40A05, 40A25, 40A30, 42A32, 42B25, 42B30, 42B37, 43A46, 43A85, 47B15, 47B37, 47B38, 47F05, 49Q05, 52C07, 52C10, 53C21, 58C40, 58J50, 58J60, 60Bxx, 60C05, 60C99, 60F10, 60G60, 60H15, 60H17, 60J80, 62E10, 62H05, 62H22, 65M60, 76B03, 76B07, 76B55, 76U05, 76W05, 76X05, 82B05, 86A10.