81786784 ÷ 872 
The aim is to understand the frequency of 872 in 81786784.

Moving on to step 1:
8 divided by 872 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 872

Going ahead to step 2:
The number 872 fits into 81 0 times, leaving a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Include the next digit (7) from the dividend after 81, then repeat: 817 / 872

Going ahead to step 3:
817 divided by 872 is 0 with a remainder of 817.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 817 after subtracting 0 from 817.
Bring next digit (8) of the dividend behind the 817 and repeat the process: 8178 / 872

Step 4:
872 goes into 8178 9 times with a remainder of 330.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we take 7848 away from 8178, we end up with 330.
Fetch the next digit (6) from the dividend, attach it to 330 and continue: 3306 / 872

Step 5:
When dividing 3306 by 872, we get 3 with a remainder of 690.
The next digit of our result is 3. 
Result so far: 93.0
Subtracting 2616 from 3306 leaves us with 690.
Fetch the next digit (7) from the dividend, attach it to 690 and continue: 6907 / 872

Advancing to step 6:
If we divide 6907 by 872, we get 7 and a remainder of 803.
The next digit of our result is 7. 
Result so far: 937.0
Deduct 6104 from 6907 and we're left with 803.
Bring next digit (8) of the dividend behind the 803 and repeat the process: 8038 / 872

Moving on to step 7:
If we divide 8038 by 872, we get 9 and a remainder of 190.
Use 9 as the next digit of our solution. 
Result so far: 9379.0
If we take 7848 away from 8038, we end up with 190.
Include the next digit (4) from the dividend after 190, then repeat: 1904 / 872

Step 8:
When dividing 1904 by 872, we get 2 with a remainder of 160.
Write down 2 as next digit of the result. 
Result so far: 93792.0
Subtract 1744 from 1904 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.

On to step 9:
1600 divided by 872 is 1 with a remainder of 728.
The number 1 becomes the next digit in our result. 
Result so far: 93792.1
If we take 872 away from 1600, we end up with 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

Let's proceed to step 10:
The number 872 fits into 7280 8 times, leaving a remainder of 304.
Put 8 as the next digit of the answer. 
Result so far: 93792.18
Deduct 6976 from 7280 and we're left with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Moving on to step 11:
872 can be fit into 3040 3 times, resulting in a remainder of 424.
Record the quotient 3 as the next digit in the result. 
Result so far: 93792.183
Deduct 2616 from 3040 and we're left with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Moving on to step 12:
872 goes into 4240 4 times with a remainder of 752.
Use 4 as the next digit of our solution. 
Result so far: 93792.1834
If we subtract 3488 from 4240, we get 752.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7520, and continue the process.

Advancing to step 13:
872 can be fit into 7520 8 times, resulting in a remainder of 544.
The number 8 becomes the next digit in our result. 
Result so far: 93792.18348
Subtracting 6976 from 7520 leaves us with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Advancing to step 14:
If we divide 5440 by 872, we get 6 and a remainder of 208.
Put 6 as the next digit of the answer. 
Result so far: 93792.183486
The remainder is 208 after subtracting 5232 from 5440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 15:
2080 divided by 872 is 2 with a remainder of 336.
Write down 2 as next digit of the result. 
Result so far: 93792.1834862
If we subtract 1744 from 2080, we get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Step 16:
When dividing 3360 by 872, we get 3 with a remainder of 744.
The number 3 becomes the next digit in our result. 
Result so far: 93792.18348623
If we take 2616 away from 3360, we end up with 744.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7440, and continue the process.

After the division, we end up with 93792.18348623 and a remainder of 7.44e-07.