We look at the division of 83016358 by 390 
The aim is to understand the frequency of 390 in 83016358.

Advancing to step 1:
When dividing 8 by 390, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 390

Going ahead to step 2:
If we divide 83 by 390, we get 0 and a remainder of 83.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 83, we get 83.
Fetch the next digit (0) from the dividend, attach it to 83 and continue: 830 / 390

Step 3:
When dividing 830 by 390, we get 2 with a remainder of 50.
The next digit of our result is 2. 
Result so far: 2.0
If we take 780 away from 830, we end up with 50.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 390

Going ahead to step 4:
When dividing 501 by 390, we get 1 with a remainder of 111.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
The remainder is 111 after subtracting 390 from 501.
Append the next digit (6) from the dividend to 111 and continue with: 1116 / 390

Advancing to step 5:
390 goes into 1116 2 times with a remainder of 336.
Write down 2 as next digit of the result. 
Result so far: 212.0
Subtracting 780 from 1116 leaves us with 336.
Fetch the next digit (3) from the dividend, attach it to 336 and continue: 3363 / 390

Going ahead to step 6:
The number 390 fits into 3363 8 times, leaving a remainder of 243.
The next digit of our result is 8. 
Result so far: 2128.0
Subtracting 3120 from 3363 leaves us with 243.
Grab the next digit (5) from the dividend, add it to 243, then carry on: 2435 / 390

Step 7:
390 goes into 2435 6 times with a remainder of 95.
Write down 6 as next digit of the result. 
Result so far: 21286.0
The remainder is 95 after subtracting 2340 from 2435.
Bring next digit (8) of the dividend behind the 95 and repeat the process: 958 / 390

Going ahead to step 8:
390 goes into 958 2 times with a remainder of 178.
Use 2 as the next digit of our solution. 
Result so far: 212862.0
Subtracting 780 from 958 leaves us with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Advancing to step 9:
When dividing 1780 by 390, we get 4 with a remainder of 220.
Record the quotient 4 as the next digit in the result. 
Result so far: 212862.4
Subtracting 1560 from 1780 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 10:
When dividing 2200 by 390, we get 5 with a remainder of 250.
Record the quotient 5 as the next digit in the result. 
Result so far: 212862.45
The remainder is 250 after subtracting 1950 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 11:
390 can be fit into 2500 6 times, resulting in a remainder of 160.
The next digit of our result is 6. 
Result so far: 212862.456
Subtract 2340 from 2500 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 12:
The number 390 fits into 1600 4 times, leaving a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 212862.4564
If we subtract 1560 from 1600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 13:
390 goes into 400 1 times with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 212862.45641
If we subtract 390 from 400, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 14:
100 divided by 390 is 0 with a remainder of 100.
The next digit of our result is 0. 
Result so far: 212862.45641
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 15:
The number 390 fits into 1000 2 times, leaving a remainder of 220.
Write down 2 as next digit of the result. 
Result so far: 212862.4564102
Subtract 780 from 1000 to get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Going ahead to step 16:
When dividing 2200 by 390, we get 5 with a remainder of 250.
Use 5 as the next digit of our solution. 
Result so far: 212862.45641025
Subtract 1950 from 2200 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

After the division, we end up with 212862.45641025 and a remainder of 2.5e-07.