We're dividing 74697516 by 644 
The aim is to understand the frequency of 644 in 74697516.

Going ahead to step 1:
When dividing 7 by 644, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 644

Step 2:
The number 644 fits into 74 0 times, leaving a remainder of 74.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 74 and we're left with 74.
Bring next digit (6) of the dividend behind the 74 and repeat the process: 746 / 644

Let's proceed to step 3:
746 divided by 644 is 1 with a remainder of 102.
The next digit of our result is 1. 
Result so far: 1.0
If we take 644 away from 746, we end up with 102.
Fetch the next digit (9) from the dividend, attach it to 102 and continue: 1029 / 644

Step 4:
When dividing 1029 by 644, we get 1 with a remainder of 385.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 644 from 1029 to get 385.
Grab the next digit (7) from the dividend, add it to 385, then carry on: 3857 / 644

Let's proceed to step 5:
If we divide 3857 by 644, we get 5 and a remainder of 637.
The number 5 becomes the next digit in our result. 
Result so far: 115.0
If we take 3220 away from 3857, we end up with 637.
Bring next digit (5) of the dividend behind the 637 and repeat the process: 6375 / 644

Moving on to step 6:
The number 644 fits into 6375 9 times, leaving a remainder of 579.
Write down 9 as next digit of the result. 
Result so far: 1159.0
The remainder is 579 after subtracting 5796 from 6375.
Fetch the next digit (1) from the dividend, attach it to 579 and continue: 5791 / 644

Moving on to step 7:
5791 divided by 644 is 8 with a remainder of 639.
The next digit of our result is 8. 
Result so far: 11598.0
Subtracting 5152 from 5791 leaves us with 639.
Grab the next digit (6) from the dividend, add it to 639, then carry on: 6396 / 644

Going ahead to step 8:
If we divide 6396 by 644, we get 9 and a remainder of 600.
Write down 9 as next digit of the result. 
Result so far: 115989.0
The remainder is 600 after subtracting 5796 from 6396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Advancing to step 9:
6000 divided by 644 is 9 with a remainder of 204.
The number 9 becomes the next digit in our result. 
Result so far: 115989.9
If we take 5796 away from 6000, we end up with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Let's proceed to step 10:
2040 divided by 644 is 3 with a remainder of 108.
Write down 3 as next digit of the result. 
Result so far: 115989.93
Subtract 1932 from 2040 to get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Going ahead to step 11:
The number 644 fits into 1080 1 times, leaving a remainder of 436.
Put 1 as the next digit of the answer. 
Result so far: 115989.931
If we subtract 644 from 1080, we get 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

On to step 12:
The number 644 fits into 4360 6 times, leaving a remainder of 496.
Write down 6 as next digit of the result. 
Result so far: 115989.9316
Subtract 3864 from 4360 to get 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

On to step 13:
When dividing 4960 by 644, we get 7 with a remainder of 452.
The next digit of our result is 7. 
Result so far: 115989.93167
Subtract 4508 from 4960 to get 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Moving on to step 14:
If we divide 4520 by 644, we get 7 and a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 115989.931677
Subtract 4508 from 4520 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 115989.931677 and a remainder of 1.2e-06.