We're dividing 91398158 by 606 
The aim is to understand the frequency of 606 in 91398158.

Let's proceed to step 1:
The number 606 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 606

Going ahead to step 2:
The number 606 fits into 91 0 times, leaving a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Bring next digit (3) of the dividend behind the 91 and repeat the process: 913 / 606

Let's proceed to step 3:
606 goes into 913 1 times with a remainder of 307.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 606 from 913 and we're left with 307.
Fetch the next digit (9) from the dividend, attach it to 307 and continue: 3079 / 606

Step 4:
When dividing 3079 by 606, we get 5 with a remainder of 49.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we subtract 3030 from 3079, we get 49.
Take the next digit (8) from the dividend and append it to 49, then repeat: 498 / 606

On to step 5:
606 can be fit into 498 0 times, resulting in a remainder of 498.
Put 0 as the next digit of the answer. 
Result so far: 150.0
Subtracting 0 from 498 leaves us with 498.
Include the next digit (1) from the dividend after 498, then repeat: 4981 / 606

Step 6:
4981 divided by 606 is 8 with a remainder of 133.
Record the quotient 8 as the next digit in the result. 
Result so far: 1508.0
The remainder is 133 after subtracting 4848 from 4981.
Take the next digit (5) from the dividend and append it to 133, then repeat: 1335 / 606

Moving on to step 7:
606 can be fit into 1335 2 times, resulting in a remainder of 123.
Use 2 as the next digit of our solution. 
Result so far: 15082.0
Subtract 1212 from 1335 to get 123.
Append the next digit (8) from the dividend to 123 and continue with: 1238 / 606

Going ahead to step 8:
606 can be fit into 1238 2 times, resulting in a remainder of 26.
Use 2 as the next digit of our solution. 
Result so far: 150822.0
Subtracting 1212 from 1238 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 9:
606 goes into 260 0 times with a remainder of 260.
Record the quotient 0 as the next digit in the result. 
Result so far: 150822.0
Deduct 0 from 260 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 10:
606 can be fit into 2600 4 times, resulting in a remainder of 176.
Put 4 as the next digit of the answer. 
Result so far: 150822.04
If we subtract 2424 from 2600, we get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Let's proceed to step 11:
606 goes into 1760 2 times with a remainder of 548.
Write down 2 as next digit of the result. 
Result so far: 150822.042
If we take 1212 away from 1760, we end up with 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Let's proceed to step 12:
The number 606 fits into 5480 9 times, leaving a remainder of 26.
The next digit of our result is 9. 
Result so far: 150822.0429
Subtract 5454 from 5480 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 13:
260 divided by 606 is 0 with a remainder of 260.
The number 0 becomes the next digit in our result. 
Result so far: 150822.0429
Deduct 0 from 260 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 14:
606 goes into 2600 4 times with a remainder of 176.
The next digit of our result is 4. 
Result so far: 150822.042904
The remainder is 176 after subtracting 2424 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Let's proceed to step 15:
606 goes into 1760 2 times with a remainder of 548.
Put 2 as the next digit of the answer. 
Result so far: 150822.0429042
Subtract 1212 from 1760 to get 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Moving on to step 16:
If we divide 5480 by 606, we get 9 and a remainder of 26.
Put 9 as the next digit of the answer. 
Result so far: 150822.04290429
Deduct 5454 from 5480 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The final result is 150822.04290429 with a remainder of 2.6e-08.