We look at the division of 15123766 by 836 
The aim is to understand the frequency of 836 in 15123766.

Advancing to step 1:
When dividing 1 by 836, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 836

Let's proceed to step 2:
836 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 836

On to step 3:
The number 836 fits into 151 0 times, leaving a remainder of 151.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 151 after subtracting 0 from 151.
Grab the next digit (2) from the dividend, add it to 151, then carry on: 1512 / 836

Step 4:
When dividing 1512 by 836, we get 1 with a remainder of 676.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 836 from 1512, we get 676.
Append the next digit (3) from the dividend to 676 and continue with: 6763 / 836

Step 5:
If we divide 6763 by 836, we get 8 and a remainder of 75.
The next digit of our result is 8. 
Result so far: 18.0
If we subtract 6688 from 6763, we get 75.
Append the next digit (7) from the dividend to 75 and continue with: 757 / 836

Step 6:
836 goes into 757 0 times with a remainder of 757.
Record the quotient 0 as the next digit in the result. 
Result so far: 180.0
Subtract 0 from 757 to get 757.
Grab the next digit (6) from the dividend, add it to 757, then carry on: 7576 / 836

Let's proceed to step 7:
7576 divided by 836 is 9 with a remainder of 52.
The number 9 becomes the next digit in our result. 
Result so far: 1809.0
Deduct 7524 from 7576 and we're left with 52.
Bring next digit (6) of the dividend behind the 52 and repeat the process: 526 / 836

Moving on to step 8:
When dividing 526 by 836, we get 0 with a remainder of 526.
Write down 0 as next digit of the result. 
Result so far: 18090.0
Deduct 0 from 526 and we're left with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Step 9:
5260 divided by 836 is 6 with a remainder of 244.
The next digit of our result is 6. 
Result so far: 18090.6
Subtract 5016 from 5260 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Step 10:
When dividing 2440 by 836, we get 2 with a remainder of 768.
Write down 2 as next digit of the result. 
Result so far: 18090.62
The remainder is 768 after subtracting 1672 from 2440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7680, and continue the process.

Moving on to step 11:
836 goes into 7680 9 times with a remainder of 156.
Put 9 as the next digit of the answer. 
Result so far: 18090.629
Subtract 7524 from 7680 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Going ahead to step 12:
When dividing 1560 by 836, we get 1 with a remainder of 724.
The next digit of our result is 1. 
Result so far: 18090.6291
Subtracting 836 from 1560 leaves us with 724.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

Moving on to step 13:
When dividing 7240 by 836, we get 8 with a remainder of 552.
Write down 8 as next digit of the result. 
Result so far: 18090.62918
Subtracting 6688 from 7240 leaves us with 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

On to step 14:
836 goes into 5520 6 times with a remainder of 504.
The next digit of our result is 6. 
Result so far: 18090.629186
If we take 5016 away from 5520, we end up with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Moving on to step 15:
The number 836 fits into 5040 6 times, leaving a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 18090.6291866
Subtract 5016 from 5040 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Our division results in 18090.6291866 with a remaining 2.4e-07.