Let's divide 64403997 by 901
The aim is to understand the frequency of 901 in 64403997.

Moving on to step 1:
901 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 901

Advancing to step 2:
901 goes into 64 0 times with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Append the next digit (4) from the dividend to 64 and continue with: 644 / 901

On to step 3:
644 divided by 901 is 0 with a remainder of 644.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 644 to get 644.
Take the next digit (0) from the dividend and append it to 644, then repeat: 6440 / 901

Let's proceed to step 4:
If we divide 6440 by 901, we get 7 and a remainder of 133.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 133 after subtracting 6307 from 6440.
Bring next digit (3) of the dividend behind the 133 and repeat the process: 1333 / 901

Step 5:
901 can be fit into 1333 1 times, resulting in a remainder of 432.
The next digit of our result is 1. 
Result so far: 71.0
Deduct 901 from 1333 and we're left with 432.
Append the next digit (9) from the dividend to 432 and continue with: 4329 / 901

On to step 6:
If we divide 4329 by 901, we get 4 and a remainder of 725.
Record the quotient 4 as the next digit in the result. 
Result so far: 714.0
Subtracting 3604 from 4329 leaves us with 725.
Include the next digit (9) from the dividend after 725, then repeat: 7259 / 901

Moving on to step 7:
901 goes into 7259 8 times with a remainder of 51.
Put 8 as the next digit of the answer. 
Result so far: 7148.0
The remainder is 51 after subtracting 7208 from 7259.
Bring next digit (7) of the dividend behind the 51 and repeat the process: 517 / 901

Moving on to step 8:
The number 901 fits into 517 0 times, leaving a remainder of 517.
Put 0 as the next digit of the answer. 
Result so far: 71480.0
Subtracting 0 from 517 leaves us with 517.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5170, and continue the process.

Let's proceed to step 9:
The number 901 fits into 5170 5 times, leaving a remainder of 665.
The next digit of our result is 5. 
Result so far: 71480.5
Subtracting 4505 from 5170 leaves us with 665.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6650, and continue the process.

Moving on to step 10:
If we divide 6650 by 901, we get 7 and a remainder of 343.
The number 7 becomes the next digit in our result. 
Result so far: 71480.57
Subtracting 6307 from 6650 leaves us with 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Step 11:
901 can be fit into 3430 3 times, resulting in a remainder of 727.
Write down 3 as next digit of the result. 
Result so far: 71480.573
Subtracting 2703 from 3430 leaves us with 727.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7270, and continue the process.

On to step 12:
901 goes into 7270 8 times with a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 71480.5738
Subtract 7208 from 7270 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 13:
If we divide 620 by 901, we get 0 and a remainder of 620.
Use 0 as the next digit of our solution. 
Result so far: 71480.5738
If we subtract 0 from 620, we get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

On to step 14:
When dividing 6200 by 901, we get 6 with a remainder of 794.
Record the quotient 6 as the next digit in the result. 
Result so far: 71480.573806
Deduct 5406 from 6200 and we're left with 794.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7940, and continue the process.

Step 15:
901 can be fit into 7940 8 times, resulting in a remainder of 732.
The number 8 becomes the next digit in our result. 
Result so far: 71480.5738068
The remainder is 732 after subtracting 7208 from 7940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7320, and continue the process.

Going ahead to step 16:
7320 divided by 901 is 8 with a remainder of 112.
The number 8 becomes the next digit in our result. 
Result so far: 71480.57380688
If we take 7208 away from 7320, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

After the division, we end up with 71480.57380688 and a remainder of 1.12e-07.