75250342 ÷ 213 
The aim is to understand the frequency of 213 in 75250342.

Going ahead to step 1:
213 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 213

On to step 2:
213 can be fit into 75 0 times, resulting in a remainder of 75.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 75 to get 75.
Fetch the next digit (2) from the dividend, attach it to 75 and continue: 752 / 213

Step 3:
If we divide 752 by 213, we get 3 and a remainder of 113.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 639 from 752 leaves us with 113.
Grab the next digit (5) from the dividend, add it to 113, then carry on: 1135 / 213

Advancing to step 4:
1135 divided by 213 is 5 with a remainder of 70.
The next digit of our result is 5. 
Result so far: 35.0
If we subtract 1065 from 1135, we get 70.
Bring next digit (0) of the dividend behind the 70 and repeat the process: 700 / 213

Going ahead to step 5:
When dividing 700 by 213, we get 3 with a remainder of 61.
The number 3 becomes the next digit in our result. 
Result so far: 353.0
If we take 639 away from 700, we end up with 61.
Take the next digit (3) from the dividend and append it to 61, then repeat: 613 / 213

Moving on to step 6:
If we divide 613 by 213, we get 2 and a remainder of 187.
The next digit of our result is 2. 
Result so far: 3532.0
Deduct 426 from 613 and we're left with 187.
Bring next digit (4) of the dividend behind the 187 and repeat the process: 1874 / 213

On to step 7:
When dividing 1874 by 213, we get 8 with a remainder of 170.
Put 8 as the next digit of the answer. 
Result so far: 35328.0
Subtracting 1704 from 1874 leaves us with 170.
Take the next digit (2) from the dividend and append it to 170, then repeat: 1702 / 213

Going ahead to step 8:
213 can be fit into 1702 7 times, resulting in a remainder of 211.
Record the quotient 7 as the next digit in the result. 
Result so far: 353287.0
Deduct 1491 from 1702 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.

Moving on to step 9:
213 can be fit into 2110 9 times, resulting in a remainder of 193.
Use 9 as the next digit of our solution. 
Result so far: 353287.9
Subtracting 1917 from 2110 leaves us with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Advancing to step 10:
When dividing 1930 by 213, we get 9 with a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 353287.99
Subtracting 1917 from 1930 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

After the division, we end up with 353287.99 and a remainder of 0.013.