We divide 31663221 by 561
The aim is to understand the frequency of 561 in 31663221.

Step 1:
561 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 561

Moving on to step 2:
If we divide 31 by 561, we get 0 and a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 31, we get 31.
Bring next digit (6) of the dividend behind the 31 and repeat the process: 316 / 561

Let's proceed to step 3:
561 goes into 316 0 times with a remainder of 316.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 316 after subtracting 0 from 316.
Include the next digit (6) from the dividend after 316, then repeat: 3166 / 561

Going ahead to step 4:
561 can be fit into 3166 5 times, resulting in a remainder of 361.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 2805 from 3166 leaves us with 361.
Fetch the next digit (3) from the dividend, attach it to 361 and continue: 3613 / 561

Moving on to step 5:
When dividing 3613 by 561, we get 6 with a remainder of 247.
The next digit of our result is 6. 
Result so far: 56.0
If we take 3366 away from 3613, we end up with 247.
Fetch the next digit (2) from the dividend, attach it to 247 and continue: 2472 / 561

On to step 6:
561 can be fit into 2472 4 times, resulting in a remainder of 228.
Use 4 as the next digit of our solution. 
Result so far: 564.0
If we subtract 2244 from 2472, we get 228.
Fetch the next digit (2) from the dividend, attach it to 228 and continue: 2282 / 561

Let's proceed to step 7:
561 goes into 2282 4 times with a remainder of 38.
The next digit of our result is 4. 
Result so far: 5644.0
Deduct 2244 from 2282 and we're left with 38.
Grab the next digit (1) from the dividend, add it to 38, then carry on: 381 / 561

Going ahead to step 8:
381 divided by 561 is 0 with a remainder of 381.
The next digit of our result is 0. 
Result so far: 56440.0
If we subtract 0 from 381, we get 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

Advancing to step 9:
When dividing 3810 by 561, we get 6 with a remainder of 444.
Record the quotient 6 as the next digit in the result. 
Result so far: 56440.6
Subtracting 3366 from 3810 leaves us with 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Let's proceed to step 10:
561 goes into 4440 7 times with a remainder of 513.
Write down 7 as next digit of the result. 
Result so far: 56440.67
Subtracting 3927 from 4440 leaves us with 513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

Step 11:
If we divide 5130 by 561, we get 9 and a remainder of 81.
Put 9 as the next digit of the answer. 
Result so far: 56440.679
Subtract 5049 from 5130 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 12:
810 divided by 561 is 1 with a remainder of 249.
Put 1 as the next digit of the answer. 
Result so far: 56440.6791
The remainder is 249 after subtracting 561 from 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Step 13:
561 goes into 2490 4 times with a remainder of 246.
The next digit of our result is 4. 
Result so far: 56440.67914
Subtracting 2244 from 2490 leaves us with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

On to step 14:
The number 561 fits into 2460 4 times, leaving a remainder of 216.
Write down 4 as next digit of the result. 
Result so far: 56440.679144
The remainder is 216 after subtracting 2244 from 2460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Our division results in 56440.679144 with a remaining 2.16e-05.