6524396 ÷ 639 
The aim is to understand the frequency of 639 in 6524396.

Going ahead to step 1:
The number 639 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 639

Moving on to step 2:
639 can be fit into 65 0 times, resulting in a remainder of 65.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 65 after subtracting 0 from 65.
Bring next digit (2) of the dividend behind the 65 and repeat the process: 652 / 639

Moving on to step 3:
639 goes into 652 1 times with a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 13 after subtracting 639 from 652.
Fetch the next digit (4) from the dividend, attach it to 13 and continue: 134 / 639

Step 4:
The number 639 fits into 134 0 times, leaving a remainder of 134.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtract 0 from 134 to get 134.
Include the next digit (3) from the dividend after 134, then repeat: 1343 / 639

Let's proceed to step 5:
When dividing 1343 by 639, we get 2 with a remainder of 65.
Record the quotient 2 as the next digit in the result. 
Result so far: 102.0
Subtract 1278 from 1343 to get 65.
Append the next digit (9) from the dividend to 65 and continue with: 659 / 639

Advancing to step 6:
When dividing 659 by 639, we get 1 with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 1021.0
If we subtract 639 from 659, we get 20.
Grab the next digit (6) from the dividend, add it to 20, then carry on: 206 / 639

Going ahead to step 7:
If we divide 206 by 639, we get 0 and a remainder of 206.
The number 0 becomes the next digit in our result. 
Result so far: 10210.0
If we take 0 away from 206, we end up with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Step 8:
2060 divided by 639 is 3 with a remainder of 143.
Use 3 as the next digit of our solution. 
Result so far: 10210.3
If we take 1917 away from 2060, we end up with 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Moving on to step 9:
639 goes into 1430 2 times with a remainder of 152.
Put 2 as the next digit of the answer. 
Result so far: 10210.32
Subtract 1278 from 1430 to get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

On to step 10:
When dividing 1520 by 639, we get 2 with a remainder of 242.
The number 2 becomes the next digit in our result. 
Result so far: 10210.322
Subtracting 1278 from 1520 leaves us with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Our division results in 10210.322 with a remaining 0.0242.