to put forth an effort

Why would anyone use sixthing when any (N − a²) divisible by 6 would also be divisible by 3? The answer is that sometimes the numerator and/or the denominator is simpler in sixthing,

For a campaign document presented in the disguise of economic or sociological literature, commend us to Frances A. Kellor, chairman-ess of the woman’s committee of the National Hughes alliance;

She looked from one to another pleadingly.