We look at the division of 78645222 by 837 
The aim is to understand the frequency of 837 in 78645222.

Advancing to step 1:
The number 837 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 837

Going ahead to step 2:
The number 837 fits into 78 0 times, leaving a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Fetch the next digit (6) from the dividend, attach it to 78 and continue: 786 / 837

Going ahead to step 3:
786 divided by 837 is 0 with a remainder of 786.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 786, we get 786.
Include the next digit (4) from the dividend after 786, then repeat: 7864 / 837

Going ahead to step 4:
When dividing 7864 by 837, we get 9 with a remainder of 331.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 7533 from 7864, we get 331.
Bring next digit (5) of the dividend behind the 331 and repeat the process: 3315 / 837

Step 5:
837 goes into 3315 3 times with a remainder of 804.
Put 3 as the next digit of the answer. 
Result so far: 93.0
The remainder is 804 after subtracting 2511 from 3315.
Fetch the next digit (2) from the dividend, attach it to 804 and continue: 8042 / 837

Advancing to step 6:
8042 divided by 837 is 9 with a remainder of 509.
Write down 9 as next digit of the result. 
Result so far: 939.0
Subtracting 7533 from 8042 leaves us with 509.
Fetch the next digit (2) from the dividend, attach it to 509 and continue: 5092 / 837

Let's proceed to step 7:
837 can be fit into 5092 6 times, resulting in a remainder of 70.
The next digit of our result is 6. 
Result so far: 9396.0
If we take 5022 away from 5092, we end up with 70.
Fetch the next digit (2) from the dividend, attach it to 70 and continue: 702 / 837

Moving on to step 8:
837 goes into 702 0 times with a remainder of 702.
The next digit of our result is 0. 
Result so far: 93960.0
Subtract 0 from 702 to get 702.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7020, and continue the process.

Advancing to step 9:
837 goes into 7020 8 times with a remainder of 324.
The number 8 becomes the next digit in our result. 
Result so far: 93960.8
If we take 6696 away from 7020, 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.

Let's proceed to step 10:
The number 837 fits into 3240 3 times, leaving a remainder of 729.
Put 3 as the next digit of the answer. 
Result so far: 93960.83
If we subtract 2511 from 3240, we get 729.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7290, and continue the process.

On to step 11:
7290 divided by 837 is 8 with a remainder of 594.
The next digit of our result is 8. 
Result so far: 93960.838
If we take 6696 away from 7290, we end up with 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Going ahead to step 12:
When dividing 5940 by 837, we get 7 with a remainder of 81.
Use 7 as the next digit of our solution. 
Result so far: 93960.8387
Deduct 5859 from 5940 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Advancing to step 13:
837 can be fit into 810 0 times, resulting in a remainder of 810.
Put 0 as the next digit of the answer. 
Result so far: 93960.8387
Deduct 0 from 810 and we're left with 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8100, and continue the process.

Step 14:
When dividing 8100 by 837, we get 9 with a remainder of 567.
The number 9 becomes the next digit in our result. 
Result so far: 93960.838709
Subtract 7533 from 8100 to get 567.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5670, and continue the process.

Let's proceed to step 15:
The number 837 fits into 5670 6 times, leaving a remainder of 648.
The next digit of our result is 6. 
Result so far: 93960.8387096
Deduct 5022 from 5670 and we're left with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Advancing to step 16:
837 goes into 6480 7 times with a remainder of 621.
The number 7 becomes the next digit in our result. 
Result so far: 93960.83870967
Deduct 5859 from 6480 and we're left with 621.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6210, and continue the process.

The final result is 93960.83870967 with a remainder of 6.21e-07.