We look at the division of 43664556 by 615 
The aim is to understand the frequency of 615 in 43664556.

Going ahead to step 1:
If we divide 4 by 615, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 615

Moving on to step 2:
43 divided by 615 is 0 with a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Append the next digit (6) from the dividend to 43 and continue with: 436 / 615

Going ahead to step 3:
436 divided by 615 is 0 with a remainder of 436.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 436, we get 436.
Grab the next digit (6) from the dividend, add it to 436, then carry on: 4366 / 615

Advancing to step 4:
If we divide 4366 by 615, we get 7 and a remainder of 61.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 4305 away from 4366, we end up with 61.
Bring next digit (4) of the dividend behind the 61 and repeat the process: 614 / 615

Advancing to step 5:
615 can be fit into 614 0 times, resulting in a remainder of 614.
Use 0 as the next digit of our solution. 
Result so far: 70.0
Subtract 0 from 614 to get 614.
Include the next digit (5) from the dividend after 614, then repeat: 6145 / 615

Moving on to step 6:
When dividing 6145 by 615, we get 9 with a remainder of 610.
The next digit of our result is 9. 
Result so far: 709.0
Subtract 5535 from 6145 to get 610.
Append the next digit (5) from the dividend to 610 and continue with: 6105 / 615

Let's proceed to step 7:
615 can be fit into 6105 9 times, resulting in a remainder of 570.
The next digit of our result is 9. 
Result so far: 7099.0
If we take 5535 away from 6105, we end up with 570.
Append the next digit (6) from the dividend to 570 and continue with: 5706 / 615

On to step 8:
615 goes into 5706 9 times with a remainder of 171.
Use 9 as the next digit of our solution. 
Result so far: 70999.0
The remainder is 171 after subtracting 5535 from 5706.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Let's proceed to step 9:
The number 615 fits into 1710 2 times, leaving a remainder of 480.
Record the quotient 2 as the next digit in the result. 
Result so far: 70999.2
If we take 1230 away from 1710, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 10:
If we divide 4800 by 615, we get 7 and a remainder of 495.
Use 7 as the next digit of our solution. 
Result so far: 70999.27
Deduct 4305 from 4800 and we're left with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Going ahead to step 11:
The number 615 fits into 4950 8 times, leaving a remainder of 30.
Use 8 as the next digit of our solution. 
Result so far: 70999.278
If we take 4920 away from 4950, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 12:
If we divide 300 by 615, we get 0 and a remainder of 300.
Use 0 as the next digit of our solution. 
Result so far: 70999.278
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Advancing to step 13:
If we divide 3000 by 615, we get 4 and a remainder of 540.
The number 4 becomes the next digit in our result. 
Result so far: 70999.27804
Subtracting 2460 from 3000 leaves us with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Moving on to step 14:
5400 divided by 615 is 8 with a remainder of 480.
Record the quotient 8 as the next digit in the result. 
Result so far: 70999.278048
Deduct 4920 from 5400 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 15:
615 can be fit into 4800 7 times, resulting in a remainder of 495.
The next digit of our result is 7. 
Result so far: 70999.2780487
Subtracting 4305 from 4800 leaves us with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Advancing to step 16:
615 can be fit into 4950 8 times, resulting in a remainder of 30.
Record the quotient 8 as the next digit in the result. 
Result so far: 70999.27804878
Subtracting 4920 from 4950 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 70999.27804878 with a remaining 3e-08.