Let's divide 84872197 by 561
The aim is to understand the frequency of 561 in 84872197.

Step 1:
The number 561 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 561

Moving on to step 2:
When dividing 84 by 561, we get 0 with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 84 and we're left with 84.
Fetch the next digit (8) from the dividend, attach it to 84 and continue: 848 / 561

Advancing to step 3:
561 can be fit into 848 1 times, resulting in a remainder of 287.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 561 from 848 to get 287.
Take the next digit (7) from the dividend and append it to 287, then repeat: 2877 / 561

Advancing to step 4:
The number 561 fits into 2877 5 times, leaving a remainder of 72.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we subtract 2805 from 2877, we get 72.
Take the next digit (2) from the dividend and append it to 72, then repeat: 722 / 561

Moving on to step 5:
561 can be fit into 722 1 times, resulting in a remainder of 161.
Put 1 as the next digit of the answer. 
Result so far: 151.0
If we subtract 561 from 722, we get 161.
Append the next digit (1) from the dividend to 161 and continue with: 1611 / 561

Let's proceed to step 6:
When dividing 1611 by 561, we get 2 with a remainder of 489.
Record the quotient 2 as the next digit in the result. 
Result so far: 1512.0
If we subtract 1122 from 1611, we get 489.
Append the next digit (9) from the dividend to 489 and continue with: 4899 / 561

Advancing to step 7:
4899 divided by 561 is 8 with a remainder of 411.
Put 8 as the next digit of the answer. 
Result so far: 15128.0
The remainder is 411 after subtracting 4488 from 4899.
Include the next digit (7) from the dividend after 411, then repeat: 4117 / 561

On to step 8:
561 goes into 4117 7 times with a remainder of 190.
The number 7 becomes the next digit in our result. 
Result so far: 151287.0
If we subtract 3927 from 4117, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Let's proceed to step 9:
561 goes into 1900 3 times with a remainder of 217.
Put 3 as the next digit of the answer. 
Result so far: 151287.3
Deduct 1683 from 1900 and we're left with 217.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

Step 10:
When dividing 2170 by 561, we get 3 with a remainder of 487.
Record the quotient 3 as the next digit in the result. 
Result so far: 151287.33
If we subtract 1683 from 2170, we get 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

The quotient of the division is 151287.33, and the remainder is 0.487.