We're dividing 12126605 by 217 
The aim is to understand the frequency of 217 in 12126605.

Let's proceed to step 1:
217 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 217

Advancing to step 2:
12 divided by 217 is 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 217

Moving on to step 3:
217 can be fit into 121 0 times, resulting in a remainder of 121.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 121 and we're left with 121.
Grab the next digit (2) from the dividend, add it to 121, then carry on: 1212 / 217

Step 4:
The number 217 fits into 1212 5 times, leaving a remainder of 127.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 1085 from 1212 leaves us with 127.
Include the next digit (6) from the dividend after 127, then repeat: 1276 / 217

Advancing to step 5:
The number 217 fits into 1276 5 times, leaving a remainder of 191.
Write down 5 as next digit of the result. 
Result so far: 55.0
Subtracting 1085 from 1276 leaves us with 191.
Take the next digit (6) from the dividend and append it to 191, then repeat: 1916 / 217

On to step 6:
If we divide 1916 by 217, we get 8 and a remainder of 180.
Put 8 as the next digit of the answer. 
Result so far: 558.0
Deduct 1736 from 1916 and we're left with 180.
Fetch the next digit (0) from the dividend, attach it to 180 and continue: 1800 / 217

On to step 7:
1800 divided by 217 is 8 with a remainder of 64.
Use 8 as the next digit of our solution. 
Result so far: 5588.0
The remainder is 64 after subtracting 1736 from 1800.
Bring next digit (5) of the dividend behind the 64 and repeat the process: 645 / 217

Step 8:
The number 217 fits into 645 2 times, leaving a remainder of 211.
Record the quotient 2 as the next digit in the result. 
Result so far: 55882.0
Deduct 434 from 645 and we're left with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Step 9:
217 can be fit into 2110 9 times, resulting in a remainder of 157.
Write down 9 as next digit of the result. 
Result so far: 55882.9
Deduct 1953 from 2110 and we're left with 157.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

Let's proceed to step 10:
When dividing 1570 by 217, we get 7 with a remainder of 51.
Use 7 as the next digit of our solution. 
Result so far: 55882.97
The remainder is 51 after subtracting 1519 from 1570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 11:
217 goes into 510 2 times with a remainder of 76.
Record the quotient 2 as the next digit in the result. 
Result so far: 55882.972
If we subtract 434 from 510, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 12:
The number 217 fits into 760 3 times, leaving a remainder of 109.
The number 3 becomes the next digit in our result. 
Result so far: 55882.9723
Subtract 651 from 760 to get 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Let's proceed to step 13:
The number 217 fits into 1090 5 times, leaving a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 55882.97235
If we take 1085 away from 1090, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 14:
The number 217 fits into 50 0 times, leaving a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 55882.97235
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 15:
The number 217 fits into 500 2 times, leaving a remainder of 66.
Use 2 as the next digit of our solution. 
Result so far: 55882.9723502
The remainder is 66 after subtracting 434 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 16:
The number 217 fits into 660 3 times, leaving a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 55882.97235023
Deduct 651 from 660 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 55882.97235023 with a remaining 9e-09.