2171833 ÷ 220 
The aim is to understand the frequency of 220 in 2171833.

Advancing to step 1:
If we divide 2 by 220, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 220

Step 2:
When dividing 21 by 220, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (7) from the dividend after 21, then repeat: 217 / 220

On to step 3:
217 divided by 220 is 0 with a remainder of 217.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 217 after subtracting 0 from 217.
Bring next digit (1) of the dividend behind the 217 and repeat the process: 2171 / 220

Advancing to step 4:
220 can be fit into 2171 9 times, resulting in a remainder of 191.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we subtract 1980 from 2171, we get 191.
Take the next digit (8) from the dividend and append it to 191, then repeat: 1918 / 220

Advancing to step 5:
220 can be fit into 1918 8 times, resulting in a remainder of 158.
Write down 8 as next digit of the result. 
Result so far: 98.0
Subtracting 1760 from 1918 leaves us with 158.
Bring next digit (3) of the dividend behind the 158 and repeat the process: 1583 / 220

Step 6:
If we divide 1583 by 220, we get 7 and a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 987.0
Subtract 1540 from 1583 to get 43.
Fetch the next digit (3) from the dividend, attach it to 43 and continue: 433 / 220

Let's proceed to step 7:
220 can be fit into 433 1 times, resulting in a remainder of 213.
The number 1 becomes the next digit in our result. 
Result so far: 9871.0
If we take 220 away from 433, we end up with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Step 8:
When dividing 2130 by 220, we get 9 with a remainder of 150.
Put 9 as the next digit of the answer. 
Result so far: 9871.9
The remainder is 150 after subtracting 1980 from 2130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Moving on to step 9:
When dividing 1500 by 220, we get 6 with a remainder of 180.
Write down 6 as next digit of the result. 
Result so far: 9871.96
Subtracting 1320 from 1500 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Moving on to step 10:
220 goes into 1800 8 times with a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 9871.968
Deduct 1760 from 1800 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 11:
The number 220 fits into 400 1 times, leaving a remainder of 180.
Write down 1 as next digit of the result. 
Result so far: 9871.9681
Subtract 220 from 400 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 12:
The number 220 fits into 1800 8 times, leaving a remainder of 40.
The next digit of our result is 8. 
Result so far: 9871.96818
If we subtract 1760 from 1800, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 13:
400 divided by 220 is 1 with a remainder of 180.
The number 1 becomes the next digit in our result. 
Result so far: 9871.968181
Deduct 220 from 400 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 14:
1800 divided by 220 is 8 with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 9871.9681818
Subtract 1760 from 1800 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 15:
400 divided by 220 is 1 with a remainder of 180.
The next digit of our result is 1. 
Result so far: 9871.96818181
If we take 220 away from 400, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Our division results in 9871.96818181 with a remaining 1.8e-07.