If the initial time is the same, once every three days and once every two days will lead to the same result.

For example, starting today, if you do something every three days, people will do it on the fourth day.

Starting today, do the same thing every two days. People will do it every two days after today. This is the fourth day.

Although the emphasis is different, the time period is emphasized every three days and the interval is emphasized every two days, but when it comes to the beginning and end of time, it is the same.

Extended data

The date problem is easy to make mistakes and difficult to understand. The error-prone points of the date problem and the key to solving the problem are as follows:

The expression 1 is prone to errors every few days, every few days, every few days, every few days, every few days.

2. The relationship is: every n days = every n+ 1 day = n+ 1 days = the n+2nd day from today = the n+ 1 day from tomorrow.

3. Pay attention to the starting point in the first few days.

4. Usually, the problem of calculating the date is converted into every n days, that is, today's date plus n is the next date, and so is the week, and the week of the day plus n is the next week.

In short, every few days is one more day than every few days. For example, take medicine once every two days. If you take medicine on Monday today, it means the third day, that is, Thursday. But every other day, Wednesday.