We're dividing 66114153 by 621 
The aim is to understand the frequency of 621 in 66114153.

Moving on to step 1:
621 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 621

Going ahead to step 2:
If we divide 66 by 621, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (1) from the dividend, attach it to 66 and continue: 661 / 621

Step 3:
661 divided by 621 is 1 with a remainder of 40.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 621 from 661, we get 40.
Bring next digit (1) of the dividend behind the 40 and repeat the process: 401 / 621

Let's proceed to step 4:
When dividing 401 by 621, we get 0 with a remainder of 401.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 401 to get 401.
Fetch the next digit (4) from the dividend, attach it to 401 and continue: 4014 / 621

On to step 5:
4014 divided by 621 is 6 with a remainder of 288.
Record the quotient 6 as the next digit in the result. 
Result so far: 106.0
If we subtract 3726 from 4014, we get 288.
Fetch the next digit (1) from the dividend, attach it to 288 and continue: 2881 / 621

On to step 6:
621 goes into 2881 4 times with a remainder of 397.
Write down 4 as next digit of the result. 
Result so far: 1064.0
Subtracting 2484 from 2881 leaves us with 397.
Include the next digit (5) from the dividend after 397, then repeat: 3975 / 621

On to step 7:
621 goes into 3975 6 times with a remainder of 249.
The number 6 becomes the next digit in our result. 
Result so far: 10646.0
Subtract 3726 from 3975 to get 249.
Grab the next digit (3) from the dividend, add it to 249, then carry on: 2493 / 621

On to step 8:
If we divide 2493 by 621, we get 4 and a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 106464.0
If we take 2484 away from 2493, we end up 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.

Moving on to step 9:
621 goes into 90 0 times with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 106464.0
If we take 0 away from 90, we end up 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.

Let's proceed to step 10:
621 goes into 900 1 times with a remainder of 279.
Use 1 as the next digit of our solution. 
Result so far: 106464.01
The remainder is 279 after subtracting 621 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Moving on to step 11:
621 goes into 2790 4 times with a remainder of 306.
Write down 4 as next digit of the result. 
Result so far: 106464.014
If we take 2484 away from 2790, we end up with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Moving on to step 12:
The number 621 fits into 3060 4 times, leaving a remainder of 576.
The number 4 becomes the next digit in our result. 
Result so far: 106464.0144
If we subtract 2484 from 3060, we get 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

The quotient of the division is 106464.0144, and the remainder is 0.00576.