Let's divide 52874387 by 644
The aim is to understand the frequency of 644 in 52874387.

Moving on to step 1:
644 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 644

Moving on to step 2:
The number 644 fits into 52 0 times, leaving a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 52, we get 52.
Take the next digit (8) from the dividend and append it to 52, then repeat: 528 / 644

Going ahead to step 3:
644 can be fit into 528 0 times, resulting in a remainder of 528.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 528 to get 528.
Fetch the next digit (7) from the dividend, attach it to 528 and continue: 5287 / 644

Moving on to step 4:
644 goes into 5287 8 times with a remainder of 135.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 135 after subtracting 5152 from 5287.
Append the next digit (4) from the dividend to 135 and continue with: 1354 / 644

Step 5:
The number 644 fits into 1354 2 times, leaving a remainder of 66.
Use 2 as the next digit of our solution. 
Result so far: 82.0
Deduct 1288 from 1354 and we're left with 66.
Fetch the next digit (3) from the dividend, attach it to 66 and continue: 663 / 644

Step 6:
663 divided by 644 is 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 821.0
Subtracting 644 from 663 leaves us with 19.
Bring next digit (8) of the dividend behind the 19 and repeat the process: 198 / 644

Moving on to step 7:
198 divided by 644 is 0 with a remainder of 198.
Write down 0 as next digit of the result. 
Result so far: 8210.0
The remainder is 198 after subtracting 0 from 198.
Take the next digit (7) from the dividend and append it to 198, then repeat: 1987 / 644

Step 8:
If we divide 1987 by 644, we get 3 and a remainder of 55.
The next digit of our result is 3. 
Result so far: 82103.0
If we subtract 1932 from 1987, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 9:
The number 644 fits into 550 0 times, leaving a remainder of 550.
The next digit of our result is 0. 
Result so far: 82103.0
Subtracting 0 from 550 leaves us with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

On to step 10:
644 goes into 5500 8 times with a remainder of 348.
Use 8 as the next digit of our solution. 
Result so far: 82103.08
The remainder is 348 after subtracting 5152 from 5500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

On to step 11:
644 can be fit into 3480 5 times, resulting in a remainder of 260.
Use 5 as the next digit of our solution. 
Result so far: 82103.085
Subtracting 3220 from 3480 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 12:
When dividing 2600 by 644, we get 4 with a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 82103.0854
The remainder is 24 after subtracting 2576 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 13:
644 goes into 240 0 times with a remainder of 240.
Record the quotient 0 as the next digit in the result. 
Result so far: 82103.0854
Subtract 0 from 240 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 14:
644 goes into 2400 3 times with a remainder of 468.
Write down 3 as next digit of the result. 
Result so far: 82103.085403
Subtract 1932 from 2400 to get 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

On to step 15:
644 can be fit into 4680 7 times, resulting in a remainder of 172.
Put 7 as the next digit of the answer. 
Result so far: 82103.0854037
If we subtract 4508 from 4680, we get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Moving on to step 16:
644 can be fit into 1720 2 times, resulting in a remainder of 432.
Put 2 as the next digit of the answer. 
Result so far: 82103.08540372
If we take 1288 away from 1720, we end up with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Our division results in 82103.08540372 with a remaining 4.32e-07.