We look at the division of 86746795 by 561 
The aim is to understand the frequency of 561 in 86746795.

Let's proceed to step 1:
8 divided by 561 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 561

Let's proceed to step 2:
When dividing 86 by 561, we get 0 with a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Fetch the next digit (7) from the dividend, attach it to 86 and continue: 867 / 561

Moving on to step 3:
If we divide 867 by 561, we get 1 and a remainder of 306.
The next digit of our result is 1. 
Result so far: 1.0
If we take 561 away from 867, we end up with 306.
Include the next digit (4) from the dividend after 306, then repeat: 3064 / 561

Advancing to step 4:
561 goes into 3064 5 times with a remainder of 259.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 2805 from 3064 and we're left with 259.
Append the next digit (6) from the dividend to 259 and continue with: 2596 / 561

Moving on to step 5:
If we divide 2596 by 561, we get 4 and a remainder of 352.
Use 4 as the next digit of our solution. 
Result so far: 154.0
Subtract 2244 from 2596 to get 352.
Fetch the next digit (7) from the dividend, attach it to 352 and continue: 3527 / 561

Going ahead to step 6:
The number 561 fits into 3527 6 times, leaving a remainder of 161.
The next digit of our result is 6. 
Result so far: 1546.0
Deduct 3366 from 3527 and we're left with 161.
Append the next digit (9) from the dividend to 161 and continue with: 1619 / 561

Let's proceed to step 7:
When dividing 1619 by 561, we get 2 with a remainder of 497.
Use 2 as the next digit of our solution. 
Result so far: 15462.0
Deduct 1122 from 1619 and we're left with 497.
Fetch the next digit (5) from the dividend, attach it to 497 and continue: 4975 / 561

Going ahead to step 8:
The number 561 fits into 4975 8 times, leaving a remainder of 487.
The number 8 becomes the next digit in our result. 
Result so far: 154628.0
The remainder is 487 after subtracting 4488 from 4975.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

Going ahead to step 9:
561 goes into 4870 8 times with a remainder of 382.
The number 8 becomes the next digit in our result. 
Result so far: 154628.8
If we subtract 4488 from 4870, we get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

On to step 10:
The number 561 fits into 3820 6 times, leaving a remainder of 454.
Put 6 as the next digit of the answer. 
Result so far: 154628.86
Subtract 3366 from 3820 to get 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Let's proceed to step 11:
4540 divided by 561 is 8 with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 154628.868
Subtracting 4488 from 4540 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 12:
The number 561 fits into 520 0 times, leaving a remainder of 520.
The next digit of our result is 0. 
Result so far: 154628.868
Deduct 0 from 520 and we're left with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Let's proceed to step 13:
561 goes into 5200 9 times with a remainder of 151.
The number 9 becomes the next digit in our result. 
Result so far: 154628.86809
Subtract 5049 from 5200 to get 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Step 14:
561 can be fit into 1510 2 times, resulting in a remainder of 388.
Use 2 as the next digit of our solution. 
Result so far: 154628.868092
Subtract 1122 from 1510 to get 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Let's proceed to step 15:
561 goes into 3880 6 times with a remainder of 514.
Use 6 as the next digit of our solution. 
Result so far: 154628.8680926
Subtract 3366 from 3880 to get 514.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

Going ahead to step 16:
The number 561 fits into 5140 9 times, leaving a remainder of 91.
Write down 9 as next digit of the result. 
Result so far: 154628.86809269
If we subtract 5049 from 5140, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Our division results in 154628.86809269 with a remaining 9.1e-08.