Sentence:  `` <WSD>Sometimes</WSD> we 'd have trouble persuading her to make tax-exempt charitable contributions , and I 've known her to quarrel with a plumber over a bill for fixing a faucet ; the next moment she 'd put another half million into the scholarship fund or thirty thousand into something as impractical as this unfortunate Johnston affair . 
Meaning of the word marked with <WSD> tags:  on certain occasions or in certain cases but not always; at other times for six months"