64988395 ÷ 891 
The aim is to understand the frequency of 891 in 64988395.

Let's proceed to step 1:
891 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 891

Let's proceed to step 2:
891 goes into 64 0 times with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Append the next digit (9) from the dividend to 64 and continue with: 649 / 891

Going ahead to step 3:
891 can be fit into 649 0 times, resulting in a remainder of 649.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 649 to get 649.
Append the next digit (8) from the dividend to 649 and continue with: 6498 / 891

Going ahead to step 4:
6498 divided by 891 is 7 with a remainder of 261.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 6237 from 6498, we get 261.
Include the next digit (8) from the dividend after 261, then repeat: 2618 / 891

On to step 5:
If we divide 2618 by 891, we get 2 and a remainder of 836.
Write down 2 as next digit of the result. 
Result so far: 72.0
The remainder is 836 after subtracting 1782 from 2618.
Append the next digit (3) from the dividend to 836 and continue with: 8363 / 891

Moving on to step 6:
891 goes into 8363 9 times with a remainder of 344.
Write down 9 as next digit of the result. 
Result so far: 729.0
Subtracting 8019 from 8363 leaves us with 344.
Bring next digit (9) of the dividend behind the 344 and repeat the process: 3449 / 891

Going ahead to step 7:
If we divide 3449 by 891, we get 3 and a remainder of 776.
The number 3 becomes the next digit in our result. 
Result so far: 7293.0
The remainder is 776 after subtracting 2673 from 3449.
Append the next digit (5) from the dividend to 776 and continue with: 7765 / 891

Step 8:
891 goes into 7765 8 times with a remainder of 637.
Put 8 as the next digit of the answer. 
Result so far: 72938.0
Subtracting 7128 from 7765 leaves us with 637.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6370, and continue the process.

Step 9:
If we divide 6370 by 891, we get 7 and a remainder of 133.
Put 7 as the next digit of the answer. 
Result so far: 72938.7
If we subtract 6237 from 6370, we get 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Let's proceed to step 10:
891 can be fit into 1330 1 times, resulting in a remainder of 439.
The number 1 becomes the next digit in our result. 
Result so far: 72938.71
If we take 891 away from 1330, we end up with 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

On to step 11:
If we divide 4390 by 891, we get 4 and a remainder of 826.
Put 4 as the next digit of the answer. 
Result so far: 72938.714
If we take 3564 away from 4390, we end up with 826.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8260, and continue the process.

On to step 12:
When dividing 8260 by 891, we get 9 with a remainder of 241.
The number 9 becomes the next digit in our result. 
Result so far: 72938.7149
If we subtract 8019 from 8260, we get 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Moving on to step 13:
When dividing 2410 by 891, we get 2 with a remainder of 628.
Use 2 as the next digit of our solution. 
Result so far: 72938.71492
Subtracting 1782 from 2410 leaves us with 628.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6280, and continue the process.

Going ahead to step 14:
When dividing 6280 by 891, we get 7 with a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 72938.714927
If we take 6237 away from 6280, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 15:
891 goes into 430 0 times with a remainder of 430.
Put 0 as the next digit of the answer. 
Result so far: 72938.714927
Subtract 0 from 430 to get 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Going ahead to step 16:
The number 891 fits into 4300 4 times, leaving a remainder of 736.
Record the quotient 4 as the next digit in the result. 
Result so far: 72938.71492704
If we subtract 3564 from 4300, we get 736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

The final result is 72938.71492704 with a remainder of 7.36e-07.