We're dividing 20135486 by 390 
The aim is to understand the frequency of 390 in 20135486.

Step 1:
The number 390 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 390

Moving on to step 2:
The number 390 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Take the next digit (1) from the dividend and append it to 20, then repeat: 201 / 390

Step 3:
390 goes into 201 0 times with a remainder of 201.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 201 leaves us with 201.
Fetch the next digit (3) from the dividend, attach it to 201 and continue: 2013 / 390

Moving on to step 4:
If we divide 2013 by 390, we get 5 and a remainder of 63.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 63 after subtracting 1950 from 2013.
Include the next digit (5) from the dividend after 63, then repeat: 635 / 390

Moving on to step 5:
If we divide 635 by 390, we get 1 and a remainder of 245.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
The remainder is 245 after subtracting 390 from 635.
Fetch the next digit (4) from the dividend, attach it to 245 and continue: 2454 / 390

Moving on to step 6:
The number 390 fits into 2454 6 times, leaving a remainder of 114.
The number 6 becomes the next digit in our result. 
Result so far: 516.0
Subtract 2340 from 2454 to get 114.
Include the next digit (8) from the dividend after 114, then repeat: 1148 / 390

Let's proceed to step 7:
1148 divided by 390 is 2 with a remainder of 368.
Record the quotient 2 as the next digit in the result. 
Result so far: 5162.0
Subtracting 780 from 1148 leaves us with 368.
Grab the next digit (6) from the dividend, add it to 368, then carry on: 3686 / 390

Let's proceed to step 8:
3686 divided by 390 is 9 with a remainder of 176.
The number 9 becomes the next digit in our result. 
Result so far: 51629.0
If we subtract 3510 from 3686, we get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Advancing to step 9:
1760 divided by 390 is 4 with a remainder of 200.
Use 4 as the next digit of our solution. 
Result so far: 51629.4
If we take 1560 away from 1760, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 10:
When dividing 2000 by 390, we get 5 with a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 51629.45
The remainder is 50 after subtracting 1950 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 11:
500 divided by 390 is 1 with a remainder of 110.
Record the quotient 1 as the next digit in the result. 
Result so far: 51629.451
If we take 390 away from 500, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 12:
390 can be fit into 1100 2 times, resulting in a remainder of 320.
The number 2 becomes the next digit in our result. 
Result so far: 51629.4512
Subtract 780 from 1100 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 13:
If we divide 3200 by 390, we get 8 and a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 51629.45128
Subtracting 3120 from 3200 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 14:
800 divided by 390 is 2 with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 51629.451282
Deduct 780 from 800 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 15:
If we divide 200 by 390, we get 0 and a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 51629.451282
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Going ahead to step 16:
390 can be fit into 2000 5 times, resulting in a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 51629.45128205
The remainder is 50 after subtracting 1950 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final result is 51629.45128205 with a remainder of 5e-08.