We look at the division of 57044415 by 661 
The aim is to understand the frequency of 661 in 57044415.

On to step 1:
661 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 661

Let's proceed to step 2:
The number 661 fits into 57 0 times, leaving a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 57 leaves us with 57.
Append the next digit (0) from the dividend to 57 and continue with: 570 / 661

Going ahead to step 3:
If we divide 570 by 661, we get 0 and a remainder of 570.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 570, we get 570.
Bring next digit (4) of the dividend behind the 570 and repeat the process: 5704 / 661

Let's proceed to step 4:
5704 divided by 661 is 8 with a remainder of 416.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 5288 from 5704 to get 416.
Grab the next digit (4) from the dividend, add it to 416, then carry on: 4164 / 661

Moving on to step 5:
661 goes into 4164 6 times with a remainder of 198.
The number 6 becomes the next digit in our result. 
Result so far: 86.0
Subtracting 3966 from 4164 leaves us with 198.
Include the next digit (4) from the dividend after 198, then repeat: 1984 / 661

Let's proceed to step 6:
When dividing 1984 by 661, we get 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 863.0
The remainder is 1 after subtracting 1983 from 1984.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 661

Advancing to step 7:
When dividing 11 by 661, we get 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 8630.0
If we subtract 0 from 11, we get 11.
Append the next digit (5) from the dividend to 11 and continue with: 115 / 661

Going ahead to step 8:
661 goes into 115 0 times with a remainder of 115.
The next digit of our result is 0. 
Result so far: 86300.0
The remainder is 115 after subtracting 0 from 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Advancing to step 9:
When dividing 1150 by 661, we get 1 with a remainder of 489.
The number 1 becomes the next digit in our result. 
Result so far: 86300.1
Subtracting 661 from 1150 leaves us with 489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

On to step 10:
661 can be fit into 4890 7 times, resulting in a remainder of 263.
The next digit of our result is 7. 
Result so far: 86300.17
If we subtract 4627 from 4890, we get 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

Advancing to step 11:
661 can be fit into 2630 3 times, resulting in a remainder of 647.
Put 3 as the next digit of the answer. 
Result so far: 86300.173
Deduct 1983 from 2630 and we're left with 647.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6470, and continue the process.

Going ahead to step 12:
661 goes into 6470 9 times with a remainder of 521.
The next digit of our result is 9. 
Result so far: 86300.1739
Subtracting 5949 from 6470 leaves us with 521.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5210, and continue the process.

Step 13:
The number 661 fits into 5210 7 times, leaving a remainder of 583.
Put 7 as the next digit of the answer. 
Result so far: 86300.17397
If we take 4627 away from 5210, we end up with 583.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

Moving on to step 14:
661 can be fit into 5830 8 times, resulting in a remainder of 542.
The number 8 becomes the next digit in our result. 
Result so far: 86300.173978
Deduct 5288 from 5830 and we're left with 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Step 15:
The number 661 fits into 5420 8 times, leaving a remainder of 132.
Write down 8 as next digit of the result. 
Result so far: 86300.1739788
Subtract 5288 from 5420 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Our division results in 86300.1739788 with a remaining 1.32e-06.