99979889 ÷ 605 
The aim is to understand the frequency of 605 in 99979889.

Let's proceed to step 1:
605 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 605

Step 2:
When dividing 99 by 605, we get 0 with a remainder of 99.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Take the next digit (9) from the dividend and append it to 99, then repeat: 999 / 605

Let's proceed to step 3:
605 can be fit into 999 1 times, resulting in a remainder of 394.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 605 from 999, we get 394.
Append the next digit (7) from the dividend to 394 and continue with: 3947 / 605

Step 4:
605 can be fit into 3947 6 times, resulting in a remainder of 317.
The next digit of our result is 6. 
Result so far: 16.0
If we subtract 3630 from 3947, we get 317.
Take the next digit (9) from the dividend and append it to 317, then repeat: 3179 / 605

Going ahead to step 5:
605 goes into 3179 5 times with a remainder of 154.
Record the quotient 5 as the next digit in the result. 
Result so far: 165.0
If we subtract 3025 from 3179, we get 154.
Grab the next digit (8) from the dividend, add it to 154, then carry on: 1548 / 605

Let's proceed to step 6:
When dividing 1548 by 605, we get 2 with a remainder of 338.
Record the quotient 2 as the next digit in the result. 
Result so far: 1652.0
Subtracting 1210 from 1548 leaves us with 338.
Bring next digit (8) of the dividend behind the 338 and repeat the process: 3388 / 605

Step 7:
The number 605 fits into 3388 5 times, leaving a remainder of 363.
The next digit of our result is 5. 
Result so far: 16525.0
Subtracting 3025 from 3388 leaves us with 363.
Grab the next digit (9) from the dividend, add it to 363, then carry on: 3639 / 605

Step 8:
When dividing 3639 by 605, we get 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 165256.0
If we subtract 3630 from 3639, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
605 goes into 90 0 times with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 165256.0
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 10:
When dividing 900 by 605, we get 1 with a remainder of 295.
Use 1 as the next digit of our solution. 
Result so far: 165256.01
If we take 605 away from 900, we end up with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Let's proceed to step 11:
If we divide 2950 by 605, we get 4 and a remainder of 530.
Write down 4 as next digit of the result. 
Result so far: 165256.014
If we subtract 2420 from 2950, we get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Advancing to step 12:
5300 divided by 605 is 8 with a remainder of 460.
Use 8 as the next digit of our solution. 
Result so far: 165256.0148
Subtracting 4840 from 5300 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

On to step 13:
The number 605 fits into 4600 7 times, leaving a remainder of 365.
The number 7 becomes the next digit in our result. 
Result so far: 165256.01487
The remainder is 365 after subtracting 4235 from 4600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Let's proceed to step 14:
3650 divided by 605 is 6 with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 165256.014876
The remainder is 20 after subtracting 3630 from 3650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 15:
605 can be fit into 200 0 times, resulting in a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 165256.014876
Subtract 0 from 200 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 16:
2000 divided by 605 is 3 with a remainder of 185.
The next digit of our result is 3. 
Result so far: 165256.01487603
Deduct 1815 from 2000 and we're left 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.

The final result is 165256.01487603 with a remainder of 1.85e-07.