The NGram is rather persuasive for using "at nighttime" but I agree with Brian Fink that hyphenation is dying in favor of two-phrase use (see what I did there?) and I believe it is a massive blunder. Hyphens can immediate and associate the meaning of a phrase which is completely dropped wh

(While the spleen is equipped with the celiac trunk, it really is derived from dorsal mesentery and for that reason not a foregut derivative) Gastroenteritis is when inflammation spreads from your abdomen into your intestines. It brings about pain, vomiting and diarrhea.   You will find a