The rhythmic grouping of eighth-quarter-eighth (or quarter-eighth-eighth or eighth-eighth-quarter) beginning on a downbeat is one of the most common speech rhythms, probably in any language. Displacing them an eighth note in either direction makes the words unintelligible ("ships arrive" becomes "ships A-rrive", "jumbo jet" becomes "jumBO jet"), but there are other words that could be mapped to that rhythm, e.g. "container". Obviously it doesn't matter in instrumental music, but speech rhythms can become rhythmic building blocks. Some words with the 8-4-8 (or 8-8-4) schema: Ships arrive Walk the streets In my youth Got around Thinking that Better than Still alive