Let's divide 90552708 by 213
The aim is to understand the frequency of 213 in 90552708.

Moving on to step 1:
9 divided by 213 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 213

Moving on to step 2:
213 goes into 90 0 times with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Bring next digit (5) of the dividend behind the 90 and repeat the process: 905 / 213

Advancing to step 3:
213 can be fit into 905 4 times, resulting in a remainder of 53.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 852 from 905 and we're left with 53.
Append the next digit (5) from the dividend to 53 and continue with: 535 / 213

On to step 4:
When dividing 535 by 213, we get 2 with a remainder of 109.
Use 2 as the next digit of our solution. 
Result so far: 42.0
The remainder is 109 after subtracting 426 from 535.
Take the next digit (2) from the dividend and append it to 109, then repeat: 1092 / 213

Let's proceed to step 5:
1092 divided by 213 is 5 with a remainder of 27.
Put 5 as the next digit of the answer. 
Result so far: 425.0
Subtract 1065 from 1092 to get 27.
Fetch the next digit (7) from the dividend, attach it to 27 and continue: 277 / 213

Advancing to step 6:
The number 213 fits into 277 1 times, leaving a remainder of 64.
Put 1 as the next digit of the answer. 
Result so far: 4251.0
Subtract 213 from 277 to get 64.
Grab the next digit (0) from the dividend, add it to 64, then carry on: 640 / 213

Step 7:
When dividing 640 by 213, we get 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 42513.0
The remainder is 1 after subtracting 639 from 640.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 213

Going ahead to step 8:
213 can be fit into 18 0 times, resulting in a remainder of 18.
The next digit of our result is 0. 
Result so far: 425130.0
If we subtract 0 from 18, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 9:
180 divided by 213 is 0 with a remainder of 180.
Record the quotient 0 as the next digit in the result. 
Result so far: 425130.0
If we subtract 0 from 180, we 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.

Advancing to step 10:
When dividing 1800 by 213, we get 8 with a remainder of 96.
Write down 8 as next digit of the result. 
Result so far: 425130.08
The remainder is 96 after subtracting 1704 from 1800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Advancing to step 11:
If we divide 960 by 213, we get 4 and a remainder of 108.
Put 4 as the next digit of the answer. 
Result so far: 425130.084
Subtract 852 from 960 to get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 12:
The number 213 fits into 1080 5 times, leaving a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 425130.0845
If we take 1065 away from 1080, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 13:
The number 213 fits into 150 0 times, leaving a remainder of 150.
The next digit of our result is 0. 
Result so far: 425130.0845
Subtract 0 from 150 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 14:
1500 divided by 213 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 425130.084507
Deduct 1491 from 1500 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.

Step 15:
213 goes into 90 0 times with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 425130.084507
Deduct 0 from 90 and we're left 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.

On to step 16:
If we divide 900 by 213, we get 4 and a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 425130.08450704
Subtracting 852 from 900 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 425130.08450704 with a remainder of 4.8e-08.