2105513 divided by 390 
The aim is to understand the frequency of 390 in 2105513.

Advancing to step 1:
If we divide 2 by 390, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 390

Step 2:
390 can be fit into 21 0 times, resulting in a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 390

Step 3:
390 can be fit into 210 0 times, resulting in a remainder of 210.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 210, we end up with 210.
Fetch the next digit (5) from the dividend, attach it to 210 and continue: 2105 / 390

Advancing to step 4:
390 can be fit into 2105 5 times, resulting in a remainder of 155.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 1950 from 2105 and we're left with 155.
Take the next digit (5) from the dividend and append it to 155, then repeat: 1555 / 390

Going ahead to step 5:
The number 390 fits into 1555 3 times, leaving a remainder of 385.
Put 3 as the next digit of the answer. 
Result so far: 53.0
If we take 1170 away from 1555, we end up with 385.
Take the next digit (1) from the dividend and append it to 385, then repeat: 3851 / 390

Moving on to step 6:
When dividing 3851 by 390, we get 9 with a remainder of 341.
Put 9 as the next digit of the answer. 
Result so far: 539.0
The remainder is 341 after subtracting 3510 from 3851.
Bring next digit (3) of the dividend behind the 341 and repeat the process: 3413 / 390

Advancing to step 7:
3413 divided by 390 is 8 with a remainder of 293.
The number 8 becomes the next digit in our result. 
Result so far: 5398.0
Deduct 3120 from 3413 and we're left with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Moving on to step 8:
When dividing 2930 by 390, we get 7 with a remainder of 200.
Write down 7 as next digit of the result. 
Result so far: 5398.7
If we subtract 2730 from 2930, 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.

Moving on to step 9:
If we divide 2000 by 390, we get 5 and a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 5398.75
Deduct 1950 from 2000 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 10:
The number 390 fits into 500 1 times, leaving a remainder of 110.
Record the quotient 1 as the next digit in the result. 
Result so far: 5398.751
The remainder is 110 after subtracting 390 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 11:
390 goes into 1100 2 times with a remainder of 320.
The number 2 becomes the next digit in our result. 
Result so far: 5398.7512
The remainder is 320 after subtracting 780 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 12:
3200 divided by 390 is 8 with a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 5398.75128
Deduct 3120 from 3200 and we're left 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 13:
390 goes into 800 2 times with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 5398.751282
Subtract 780 from 800 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
The number 390 fits into 200 0 times, leaving a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 5398.751282
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 15:
If we divide 2000 by 390, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 5398.75128205
Deduct 1950 from 2000 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 5398.75128205 and a remainder of 5e-08.