We look at the division of 83788576 by 861 
The aim is to understand the frequency of 861 in 83788576.

Going ahead to step 1:
The number 861 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 861

Going ahead to step 2:
83 divided by 861 is 0 with a remainder of 83.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Take the next digit (7) from the dividend and append it to 83, then repeat: 837 / 861

Step 3:
The number 861 fits into 837 0 times, leaving a remainder of 837.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 837 to get 837.
Take the next digit (8) from the dividend and append it to 837, then repeat: 8378 / 861

Let's proceed to step 4:
861 can be fit into 8378 9 times, resulting in a remainder of 629.
The next digit of our result is 9. 
Result so far: 9.0
If we take 7749 away from 8378, we end up with 629.
Fetch the next digit (8) from the dividend, attach it to 629 and continue: 6298 / 861

Moving on to step 5:
When dividing 6298 by 861, we get 7 with a remainder of 271.
Put 7 as the next digit of the answer. 
Result so far: 97.0
The remainder is 271 after subtracting 6027 from 6298.
Fetch the next digit (5) from the dividend, attach it to 271 and continue: 2715 / 861

Going ahead to step 6:
The number 861 fits into 2715 3 times, leaving a remainder of 132.
The number 3 becomes the next digit in our result. 
Result so far: 973.0
Subtract 2583 from 2715 to get 132.
Take the next digit (7) from the dividend and append it to 132, then repeat: 1327 / 861

Let's proceed to step 7:
If we divide 1327 by 861, we get 1 and a remainder of 466.
The number 1 becomes the next digit in our result. 
Result so far: 9731.0
Deduct 861 from 1327 and we're left with 466.
Grab the next digit (6) from the dividend, add it to 466, then carry on: 4666 / 861

Advancing to step 8:
4666 divided by 861 is 5 with a remainder of 361.
Use 5 as the next digit of our solution. 
Result so far: 97315.0
The remainder is 361 after subtracting 4305 from 4666.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

On to step 9:
When dividing 3610 by 861, we get 4 with a remainder of 166.
Write down 4 as next digit of the result. 
Result so far: 97315.4
Deduct 3444 from 3610 and we're left with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Moving on to step 10:
When dividing 1660 by 861, we get 1 with a remainder of 799.
The next digit of our result is 1. 
Result so far: 97315.41
Subtracting 861 from 1660 leaves us with 799.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7990, and continue the process.

On to step 11:
When dividing 7990 by 861, we get 9 with a remainder of 241.
Put 9 as the next digit of the answer. 
Result so far: 97315.419
The remainder is 241 after subtracting 7749 from 7990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Moving on to step 12:
The number 861 fits into 2410 2 times, leaving a remainder of 688.
The number 2 becomes the next digit in our result. 
Result so far: 97315.4192
Deduct 1722 from 2410 and we're left with 688.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6880, and continue the process.

Going ahead to step 13:
When dividing 6880 by 861, we get 7 with a remainder of 853.
Write down 7 as next digit of the result. 
Result so far: 97315.41927
If we subtract 6027 from 6880, we get 853.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8530, and continue the process.

Going ahead to step 14:
If we divide 8530 by 861, we get 9 and a remainder of 781.
Use 9 as the next digit of our solution. 
Result so far: 97315.419279
Subtracting 7749 from 8530 leaves us with 781.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7810, and continue the process.

Advancing to step 15:
When dividing 7810 by 861, we get 9 with a remainder of 61.
The next digit of our result is 9. 
Result so far: 97315.4192799
The remainder is 61 after subtracting 7749 from 7810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

After the division, we end up with 97315.4192799 and a remainder of 6.1e-07.