public Map<String, Integer> getStatusFrequencyOverPartOfDay(){
		Map<String, Integer> map = new HashMap<String, Integer>();
		
		for(Record record : log.getRecords()){
			Integer hour = record.getTime().getDate().get(Calendar.HOUR_OF_DAY);
			String partOfDay = getPartOfDate(hour);
			Integer number = map.get(partOfDay);
			if(number != null){
				map.remove(partOfDay);
				map.put(partOfDay, ++number);
			} else {
				map.put(partOfDay, 1);
			}
		}
		
		return map;
	}