23566438 divided by 691 
The aim is to understand the frequency of 691 in 23566438.

Let's proceed to step 1:
2 divided by 691 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 691

Step 2:
691 goes into 23 0 times with a remainder of 23.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 23 and we're left with 23.
Grab the next digit (5) from the dividend, add it to 23, then carry on: 235 / 691

Step 3:
691 can be fit into 235 0 times, resulting in a remainder of 235.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 235 leaves us with 235.
Bring next digit (6) of the dividend behind the 235 and repeat the process: 2356 / 691

Let's proceed to step 4:
691 goes into 2356 3 times with a remainder of 283.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 2073 from 2356 to get 283.
Include the next digit (6) from the dividend after 283, then repeat: 2836 / 691

Let's proceed to step 5:
691 goes into 2836 4 times with a remainder of 72.
Put 4 as the next digit of the answer. 
Result so far: 34.0
Deduct 2764 from 2836 and we're left with 72.
Take the next digit (4) from the dividend and append it to 72, then repeat: 724 / 691

On to step 6:
724 divided by 691 is 1 with a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 341.0
Subtract 691 from 724 to get 33.
Bring next digit (3) of the dividend behind the 33 and repeat the process: 333 / 691

On to step 7:
The number 691 fits into 333 0 times, leaving a remainder of 333.
The number 0 becomes the next digit in our result. 
Result so far: 3410.0
The remainder is 333 after subtracting 0 from 333.
Fetch the next digit (8) from the dividend, attach it to 333 and continue: 3338 / 691

Advancing to step 8:
The number 691 fits into 3338 4 times, leaving a remainder of 574.
Record the quotient 4 as the next digit in the result. 
Result so far: 34104.0
If we take 2764 away from 3338, we end up with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

On to step 9:
691 can be fit into 5740 8 times, resulting in a remainder of 212.
Record the quotient 8 as the next digit in the result. 
Result so far: 34104.8
If we subtract 5528 from 5740, we get 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Going ahead to step 10:
If we divide 2120 by 691, we get 3 and a remainder of 47.
The next digit of our result is 3. 
Result so far: 34104.83
The remainder is 47 after subtracting 2073 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 11:
The number 691 fits into 470 0 times, leaving a remainder of 470.
The next digit of our result is 0. 
Result so far: 34104.83
Subtracting 0 from 470 leaves us with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Step 12:
4700 divided by 691 is 6 with a remainder of 554.
Write down 6 as next digit of the result. 
Result so far: 34104.8306
Subtract 4146 from 4700 to get 554.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

Moving on to step 13:
The number 691 fits into 5540 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 34104.83068
Deduct 5528 from 5540 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 14:
When dividing 120 by 691, we get 0 with a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 34104.83068
Subtract 0 from 120 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 15:
691 can be fit into 1200 1 times, resulting in a remainder of 509.
Write down 1 as next digit of the result. 
Result so far: 34104.8306801
Subtract 691 from 1200 to get 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Going ahead to step 16:
5090 divided by 691 is 7 with a remainder of 253.
Use 7 as the next digit of our solution. 
Result so far: 34104.83068017
Subtract 4837 from 5090 to get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

The final outcome is 34104.83068017, with a leftover of 2.53e-07.