We divide 87088575 by 691
The aim is to understand the frequency of 691 in 87088575.

Step 1:
The number 691 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 691

Moving on to step 2:
691 can be fit into 87 0 times, resulting in a remainder of 87.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 87 after subtracting 0 from 87.
Bring next digit (0) of the dividend behind the 87 and repeat the process: 870 / 691

Step 3:
If we divide 870 by 691, we get 1 and a remainder of 179.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 691 from 870, we get 179.
Fetch the next digit (8) from the dividend, attach it to 179 and continue: 1798 / 691

Let's proceed to step 4:
1798 divided by 691 is 2 with a remainder of 416.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 1382 from 1798 and we're left with 416.
Grab the next digit (8) from the dividend, add it to 416, then carry on: 4168 / 691

Going ahead to step 5:
The number 691 fits into 4168 6 times, leaving a remainder of 22.
Record the quotient 6 as the next digit in the result. 
Result so far: 126.0
The remainder is 22 after subtracting 4146 from 4168.
Fetch the next digit (5) from the dividend, attach it to 22 and continue: 225 / 691

Step 6:
691 goes into 225 0 times with a remainder of 225.
Put 0 as the next digit of the answer. 
Result so far: 1260.0
If we subtract 0 from 225, we get 225.
Take the next digit (7) from the dividend and append it to 225, then repeat: 2257 / 691

Let's proceed to step 7:
691 goes into 2257 3 times with a remainder of 184.
The number 3 becomes the next digit in our result. 
Result so far: 12603.0
The remainder is 184 after subtracting 2073 from 2257.
Append the next digit (5) from the dividend to 184 and continue with: 1845 / 691

Let's proceed to step 8:
When dividing 1845 by 691, we get 2 with a remainder of 463.
Put 2 as the next digit of the answer. 
Result so far: 126032.0
If we subtract 1382 from 1845, we get 463.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4630, and continue the process.

Let's proceed to step 9:
The number 691 fits into 4630 6 times, leaving a remainder of 484.
Write down 6 as next digit of the result. 
Result so far: 126032.6
If we take 4146 away from 4630, we end up with 484.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4840, and continue the process.

Let's proceed to step 10:
691 goes into 4840 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 126032.67
If we take 4837 away from 4840, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 11:
The number 691 fits into 30 0 times, leaving a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 126032.67
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 12:
300 divided by 691 is 0 with a remainder of 300.
The number 0 becomes the next digit in our result. 
Result so far: 126032.67
If we take 0 away from 300, we end up with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 126032.67, with a leftover of 0.003.