static long howLongAgo_toMS(S s) {
  int i = indexOfSpace(s);
  S ns = replace(takeFirst(s, i), ",", "");
  if (!isInteger(ns)) ret 0;
  long n = parseLong(ns);
  s = trimSubstring(s, i);
  if (swic(s, "second")) ret n*1000;
  if (swic(s, "minute")) ret n*60000;
  if (swic(s, "hour")) ret n*60*60000;
  if (swic(s, "day")) ret n*24*60*60000;
  ret 0;
}