Why do you pay wages for weekly off days?
You pay because they are in your employment. Why don't you pay wages to a daily-rated worker? Because he is hired for a few days, and on the day his service is not required, he is not in your service. Similarly, when a person is on authorized leave, they will be paid a salary because they are in your service. However, if they have taken leave without intimation or have no leave to their credit, resulting in leave without pay, such days will be counted as days on which they are not in your service or as interrupted service. On a legal strike day, the employer is bound to pay wages even though the employee had not worked. Such a day will be counted as a day worked. A layoff day will also be considered a day worked because the employee is paid wages (though not 100%, but 50%).
The concept of 190/240 days
The concept of 190/240 has no relevance to regular workers because, for them, a year means 365 days. They may receive a salary for all 30/31 days in every month, except for a few days of LOP. But for a daily-rated worker, the days physically present are the days counted as service. Their engagement itself is a flexible arrangement. If you need a person to do work that is not regular in nature, you cannot afford to employ one on your permanent rolls and keep the person on the bench whenever there is no work. In such a situation, you can engage workers on a daily-rated basis and pay their wages each day or, for convenience, at the end of each spell. If your establishment works only for 5 days, your daily-rated worker can work only for a maximum of 5 days per week. As such, they will get fewer days compared to another worker engaged by an establishment that works for 6 days a week. When it comes to terminal benefits, there should be some difference in treatment, and accordingly, the law has taken a stand that an establishment that works for 5 days a week should pay its workers gratuity if they have worked for 190 days only.
Special consideration for mine workers
Also, note that the 190 days principle applies to employees in mines who work below the ground. This is because working below the ground is more difficult than working above the ground, and therefore, a differential treatment has been given to them, requiring only 190 days to make their one year continuous.
There is no practice of taking each 190/240 days and putting them one after another. Therefore, completing the 190/240 days in 8 months or 9 months is immaterial. We have to take the date of leaving service first, then take the days backward and ensure that in each year, the employee has worked for 240/190 days in each year of 12 months.