We're dividing 800691 by 87 
The aim is to understand the frequency of 87 in 800691.

Going ahead to step 1:
If we divide 8 by 87, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 87

Advancing to step 2:
80 divided by 87 is 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Take the next digit (0) from the dividend and append it to 80, then repeat: 800 / 87

On to step 3:
When dividing 800 by 87, we get 9 with a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 17 after subtracting 783 from 800.
Bring next digit (6) of the dividend behind the 17 and repeat the process: 176 / 87

Step 4:
The number 87 fits into 176 2 times, leaving a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 92.0
If we take 174 away from 176, we end up with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 87

Step 5:
When dividing 29 by 87, we get 0 with a remainder of 29.
The next digit of our result is 0. 
Result so far: 920.0
Subtract 0 from 29 to get 29.
Append the next digit (1) from the dividend to 29 and continue with: 291 / 87

Going ahead to step 6:
When dividing 291 by 87, we get 3 with a remainder of 30.
The next digit of our result is 3. 
Result so far: 9203.0
The remainder is 30 after subtracting 261 from 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 7:
If we divide 300 by 87, we get 3 and a remainder of 39.
The next digit of our result is 3. 
Result so far: 9203.3
If we subtract 261 from 300, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 8:
When dividing 390 by 87, we get 4 with a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 9203.34
Subtracting 348 from 390 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 9:
If we divide 420 by 87, we get 4 and a remainder of 72.
Put 4 as the next digit of the answer. 
Result so far: 9203.344
Subtracting 348 from 420 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Our division results in 9203.344 with a remaining 0.0072.