We're dividing 43501772 by 649 
The aim is to understand the frequency of 649 in 43501772.

Step 1:
4 divided by 649 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 649

Advancing to step 2:
The number 649 fits into 43 0 times, leaving a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Grab the next digit (5) from the dividend, add it to 43, then carry on: 435 / 649

Moving on to step 3:
649 goes into 435 0 times with a remainder of 435.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 435 and we're left with 435.
Append the next digit (0) from the dividend to 435 and continue with: 4350 / 649

Let's proceed to step 4:
When dividing 4350 by 649, we get 6 with a remainder of 456.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 3894 from 4350 leaves us with 456.
Append the next digit (1) from the dividend to 456 and continue with: 4561 / 649

Going ahead to step 5:
When dividing 4561 by 649, we get 7 with a remainder of 18.
Record the quotient 7 as the next digit in the result. 
Result so far: 67.0
If we subtract 4543 from 4561, we get 18.
Grab the next digit (7) from the dividend, add it to 18, then carry on: 187 / 649

Step 6:
The number 649 fits into 187 0 times, leaving a remainder of 187.
Use 0 as the next digit of our solution. 
Result so far: 670.0
The remainder is 187 after subtracting 0 from 187.
Append the next digit (7) from the dividend to 187 and continue with: 1877 / 649

Step 7:
When dividing 1877 by 649, we get 2 with a remainder of 579.
Record the quotient 2 as the next digit in the result. 
Result so far: 6702.0
Subtract 1298 from 1877 to get 579.
Include the next digit (2) from the dividend after 579, then repeat: 5792 / 649

Advancing to step 8:
The number 649 fits into 5792 8 times, leaving a remainder of 600.
Write down 8 as next digit of the result. 
Result so far: 67028.0
Subtract 5192 from 5792 to get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Let's proceed to step 9:
If we divide 6000 by 649, we get 9 and a remainder of 159.
Write down 9 as next digit of the result. 
Result so far: 67028.9
Deduct 5841 from 6000 and we're left with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Going ahead to step 10:
1590 divided by 649 is 2 with a remainder of 292.
Use 2 as the next digit of our solution. 
Result so far: 67028.92
If we take 1298 away from 1590, we end up with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Step 11:
When dividing 2920 by 649, we get 4 with a remainder of 324.
Record the quotient 4 as the next digit in the result. 
Result so far: 67028.924
If we take 2596 away from 2920, we end up with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Advancing to step 12:
649 can be fit into 3240 4 times, resulting in a remainder of 644.
The number 4 becomes the next digit in our result. 
Result so far: 67028.9244
The remainder is 644 after subtracting 2596 from 3240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6440, and continue the process.

Our division results in 67028.9244 with a remaining 0.00644.