17127396 divided by 561 
The aim is to understand the frequency of 561 in 17127396.

Let's proceed to step 1:
When dividing 1 by 561, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 561

On to step 2:
561 can be fit into 17 0 times, resulting in a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 17, we get 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 561

Step 3:
The number 561 fits into 171 0 times, leaving a remainder of 171.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 171 after subtracting 0 from 171.
Bring next digit (2) of the dividend behind the 171 and repeat the process: 1712 / 561

Advancing to step 4:
561 can be fit into 1712 3 times, resulting in a remainder of 29.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 1683 from 1712 leaves us with 29.
Bring next digit (7) of the dividend behind the 29 and repeat the process: 297 / 561

Advancing to step 5:
297 divided by 561 is 0 with a remainder of 297.
Use 0 as the next digit of our solution. 
Result so far: 30.0
The remainder is 297 after subtracting 0 from 297.
Take the next digit (3) from the dividend and append it to 297, then repeat: 2973 / 561

Going ahead to step 6:
2973 divided by 561 is 5 with a remainder of 168.
Use 5 as the next digit of our solution. 
Result so far: 305.0
If we subtract 2805 from 2973, we get 168.
Bring next digit (9) of the dividend behind the 168 and repeat the process: 1689 / 561

Let's proceed to step 7:
If we divide 1689 by 561, we get 3 and a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3053.0
Deduct 1683 from 1689 and we're left with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 561

Advancing to step 8:
If we divide 66 by 561, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 30530.0
Subtract 0 from 66 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 9:
561 goes into 660 1 times with a remainder of 99.
Record the quotient 1 as the next digit in the result. 
Result so far: 30530.1
The remainder is 99 after subtracting 561 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Going ahead to step 10:
990 divided by 561 is 1 with a remainder of 429.
The number 1 becomes the next digit in our result. 
Result so far: 30530.11
Deduct 561 from 990 and we're left with 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4290, and continue the process.

After the division, we end up with 30530.11 and a remainder of 0.429.