We divide 660398 by 22
The aim is to understand the frequency of 22 in 660398.

Going ahead to step 1:
The number 22 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 22

Moving on to step 2:
22 goes into 66 3 times with a remainder of 0.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 66 from 66, we get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 22

Advancing to step 3:
The number 22 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
Deduct 0 from 0 and we're left with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 22

Let's proceed to step 4:
3 divided by 22 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 300.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 22

Let's proceed to step 5:
If we divide 39 by 22, we get 1 and a remainder of 17.
The next digit of our result is 1. 
Result so far: 3001.0
The remainder is 17 after subtracting 22 from 39.
Bring next digit (8) of the dividend behind the 17 and repeat the process: 178 / 22

Let's proceed to step 6:
178 divided by 22 is 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 30018.0
Deduct 176 from 178 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
The number 22 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 30018.0
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
When dividing 200 by 22, we get 9 with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 30018.09
Deduct 198 from 200 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
If we divide 20 by 22, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 30018.09
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
When dividing 200 by 22, we get 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 30018.0909
Deduct 198 from 200 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 11:
If we divide 20 by 22, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 30018.0909
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
If we divide 200 by 22, we get 9 and a remainder of 2.
The next digit of our result is 9. 
Result so far: 30018.090909
Subtract 198 from 200 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 13:
If we divide 20 by 22, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 30018.090909
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 14:
22 goes into 200 9 times with a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 30018.09090909
Subtract 198 from 200 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 30018.09090909, with a leftover of 2e-09.