We look at the division of 24225975 by 639 
The aim is to understand the frequency of 639 in 24225975.

Step 1:
The number 639 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 639

Let's proceed to step 2:
639 goes into 24 0 times with a remainder of 24.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 24 leaves us with 24.
Bring next digit (2) of the dividend behind the 24 and repeat the process: 242 / 639

Moving on to step 3:
242 divided by 639 is 0 with a remainder of 242.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 242 after subtracting 0 from 242.
Take the next digit (2) from the dividend and append it to 242, then repeat: 2422 / 639

On to step 4:
If we divide 2422 by 639, we get 3 and a remainder of 505.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 1917 away from 2422, we end up with 505.
Append the next digit (5) from the dividend to 505 and continue with: 5055 / 639

On to step 5:
5055 divided by 639 is 7 with a remainder of 582.
Put 7 as the next digit of the answer. 
Result so far: 37.0
Subtracting 4473 from 5055 leaves us with 582.
Fetch the next digit (9) from the dividend, attach it to 582 and continue: 5829 / 639

Step 6:
639 can be fit into 5829 9 times, resulting in a remainder of 78.
Record the quotient 9 as the next digit in the result. 
Result so far: 379.0
The remainder is 78 after subtracting 5751 from 5829.
Bring next digit (7) of the dividend behind the 78 and repeat the process: 787 / 639

Step 7:
639 goes into 787 1 times with a remainder of 148.
Put 1 as the next digit of the answer. 
Result so far: 3791.0
Deduct 639 from 787 and we're left with 148.
Take the next digit (5) from the dividend and append it to 148, then repeat: 1485 / 639

Let's proceed to step 8:
639 can be fit into 1485 2 times, resulting in a remainder of 207.
Record the quotient 2 as the next digit in the result. 
Result so far: 37912.0
The remainder is 207 after subtracting 1278 from 1485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Going ahead to step 9:
639 can be fit into 2070 3 times, resulting in a remainder of 153.
The next digit of our result is 3. 
Result so far: 37912.3
The remainder is 153 after subtracting 1917 from 2070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Step 10:
1530 divided by 639 is 2 with a remainder of 252.
The next digit of our result is 2. 
Result so far: 37912.32
Deduct 1278 from 1530 and we're left with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Advancing to step 11:
When dividing 2520 by 639, we get 3 with a remainder of 603.
Put 3 as the next digit of the answer. 
Result so far: 37912.323
Subtracting 1917 from 2520 leaves us with 603.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6030, and continue the process.

Let's proceed to step 12:
639 goes into 6030 9 times with a remainder of 279.
Use 9 as the next digit of our solution. 
Result so far: 37912.3239
The remainder is 279 after subtracting 5751 from 6030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Step 13:
639 can be fit into 2790 4 times, resulting in a remainder of 234.
The next digit of our result is 4. 
Result so far: 37912.32394
Deduct 2556 from 2790 and we're left with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Step 14:
639 can be fit into 2340 3 times, resulting in a remainder of 423.
Put 3 as the next digit of the answer. 
Result so far: 37912.323943
If we subtract 1917 from 2340, we get 423.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4230, and continue the process.

Step 15:
The number 639 fits into 4230 6 times, leaving a remainder of 396.
Record the quotient 6 as the next digit in the result. 
Result so far: 37912.3239436
The remainder is 396 after subtracting 3834 from 4230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

On to step 16:
If we divide 3960 by 639, we get 6 and a remainder of 126.
Record the quotient 6 as the next digit in the result. 
Result so far: 37912.32394366
If we take 3834 away from 3960, we end up with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

The quotient of the division is 37912.32394366, and the remainder is 1.26e-07.