code: public PollingWait pollEvery(long timeAmount, @Nonnull TimeUnit timeUnit) {
          if (timeAmount <= 0) {
              throw new IllegalArgumentException("Invalid timeAmount: " + timeAmount + " -- must be greater than 0");
          }
          pollIntervalMillis = timeUnit.toMillis(timeAmount);
          return this;
      }
docs: Default: 50 milliseconds.