We look at the division of 50973175 by 390 
The aim is to understand the frequency of 390 in 50973175.

Moving on to step 1:
390 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 390

Moving on to step 2:
When dividing 50 by 390, we get 0 with a remainder of 50.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 50 to get 50.
Include the next digit (9) from the dividend after 50, then repeat: 509 / 390

Going ahead to step 3:
If we divide 509 by 390, we get 1 and a remainder of 119.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 119 after subtracting 390 from 509.
Fetch the next digit (7) from the dividend, attach it to 119 and continue: 1197 / 390

Going ahead to step 4:
390 goes into 1197 3 times with a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we subtract 1170 from 1197, we get 27.
Bring next digit (3) of the dividend behind the 27 and repeat the process: 273 / 390

On to step 5:
If we divide 273 by 390, we get 0 and a remainder of 273.
Write down 0 as next digit of the result. 
Result so far: 130.0
If we take 0 away from 273, we end up with 273.
Include the next digit (1) from the dividend after 273, then repeat: 2731 / 390

Let's proceed to step 6:
2731 divided by 390 is 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 1307.0
Subtract 2730 from 2731 to get 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 390

Advancing to step 7:
The number 390 fits into 17 0 times, leaving a remainder of 17.
The next digit of our result is 0. 
Result so far: 13070.0
If we subtract 0 from 17, we get 17.
Fetch the next digit (5) from the dividend, attach it to 17 and continue: 175 / 390

On to step 8:
390 goes into 175 0 times with a remainder of 175.
Write down 0 as next digit of the result. 
Result so far: 130700.0
The remainder is 175 after subtracting 0 from 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Step 9:
390 goes into 1750 4 times with a remainder of 190.
Use 4 as the next digit of our solution. 
Result so far: 130700.4
The remainder is 190 after subtracting 1560 from 1750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Advancing to step 10:
If we divide 1900 by 390, we get 4 and a remainder of 340.
Record the quotient 4 as the next digit in the result. 
Result so far: 130700.44
Subtracting 1560 from 1900 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

The quotient of the division is 130700.44, and the remainder is 0.34.