We look at the division of 89593447 by 661 
The aim is to understand the frequency of 661 in 89593447.

Step 1:
The number 661 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 661

Moving on to step 2:
When dividing 89 by 661, we get 0 with a remainder of 89.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 89 after subtracting 0 from 89.
Take the next digit (5) from the dividend and append it to 89, then repeat: 895 / 661

Advancing to step 3:
661 goes into 895 1 times with a remainder of 234.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 661 from 895, we get 234.
Fetch the next digit (9) from the dividend, attach it to 234 and continue: 2349 / 661

Advancing to step 4:
661 goes into 2349 3 times with a remainder of 366.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtract 1983 from 2349 to get 366.
Include the next digit (3) from the dividend after 366, then repeat: 3663 / 661

Going ahead to step 5:
3663 divided by 661 is 5 with a remainder of 358.
Put 5 as the next digit of the answer. 
Result so far: 135.0
If we subtract 3305 from 3663, we get 358.
Append the next digit (4) from the dividend to 358 and continue with: 3584 / 661

Going ahead to step 6:
If we divide 3584 by 661, we get 5 and a remainder of 279.
Put 5 as the next digit of the answer. 
Result so far: 1355.0
If we subtract 3305 from 3584, we get 279.
Grab the next digit (4) from the dividend, add it to 279, then carry on: 2794 / 661

Advancing to step 7:
661 goes into 2794 4 times with a remainder of 150.
Put 4 as the next digit of the answer. 
Result so far: 13554.0
The remainder is 150 after subtracting 2644 from 2794.
Append the next digit (7) from the dividend to 150 and continue with: 1507 / 661

On to step 8:
661 can be fit into 1507 2 times, resulting in a remainder of 185.
Write down 2 as next digit of the result. 
Result so far: 135542.0
Subtracting 1322 from 1507 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 9:
When dividing 1850 by 661, we get 2 with a remainder of 528.
Write down 2 as next digit of the result. 
Result so far: 135542.2
If we take 1322 away from 1850, we end up with 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

On to step 10:
If we divide 5280 by 661, we get 7 and a remainder of 653.
Use 7 as the next digit of our solution. 
Result so far: 135542.27
Subtracting 4627 from 5280 leaves us with 653.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6530, and continue the process.

Step 11:
The number 661 fits into 6530 9 times, leaving a remainder of 581.
The next digit of our result is 9. 
Result so far: 135542.279
If we subtract 5949 from 6530, we get 581.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5810, and continue the process.

Going ahead to step 12:
The number 661 fits into 5810 8 times, leaving a remainder of 522.
The number 8 becomes the next digit in our result. 
Result so far: 135542.2798
Subtracting 5288 from 5810 leaves us with 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Advancing to step 13:
If we divide 5220 by 661, we get 7 and a remainder of 593.
The number 7 becomes the next digit in our result. 
Result so far: 135542.27987
Subtract 4627 from 5220 to get 593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5930, and continue the process.

Advancing to step 14:
5930 divided by 661 is 8 with a remainder of 642.
The next digit of our result is 8. 
Result so far: 135542.279878
The remainder is 642 after subtracting 5288 from 5930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6420, and continue the process.

Step 15:
6420 divided by 661 is 9 with a remainder of 471.
The next digit of our result is 9. 
Result so far: 135542.2798789
Deduct 5949 from 6420 and we're left with 471.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

Going ahead to step 16:
If we divide 4710 by 661, we get 7 and a remainder of 83.
Use 7 as the next digit of our solution. 
Result so far: 135542.27987897
If we take 4627 away from 4710, we end up with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

In conclusion, the division gives 135542.27987897 with a balance of 8.3e-08.