We look at the division of 90937315 by 642 
The aim is to understand the frequency of 642 in 90937315.

Advancing to step 1:
9 divided by 642 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 642

Going ahead to step 2:
90 divided by 642 is 0 with a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Include the next digit (9) from the dividend after 90, then repeat: 909 / 642

Moving on to step 3:
909 divided by 642 is 1 with a remainder of 267.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 642 from 909 to get 267.
Fetch the next digit (3) from the dividend, attach it to 267 and continue: 2673 / 642

Let's proceed to step 4:
642 can be fit into 2673 4 times, resulting in a remainder of 105.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 2568 from 2673, we get 105.
Bring next digit (7) of the dividend behind the 105 and repeat the process: 1057 / 642

Advancing to step 5:
1057 divided by 642 is 1 with a remainder of 415.
Use 1 as the next digit of our solution. 
Result so far: 141.0
If we subtract 642 from 1057, we get 415.
Include the next digit (3) from the dividend after 415, then repeat: 4153 / 642

Moving on to step 6:
642 goes into 4153 6 times with a remainder of 301.
Use 6 as the next digit of our solution. 
Result so far: 1416.0
Subtracting 3852 from 4153 leaves us with 301.
Append the next digit (1) from the dividend to 301 and continue with: 3011 / 642

Advancing to step 7:
When dividing 3011 by 642, we get 4 with a remainder of 443.
Put 4 as the next digit of the answer. 
Result so far: 14164.0
Subtracting 2568 from 3011 leaves us with 443.
Bring next digit (5) of the dividend behind the 443 and repeat the process: 4435 / 642

Let's proceed to step 8:
642 can be fit into 4435 6 times, resulting in a remainder of 583.
Use 6 as the next digit of our solution. 
Result so far: 141646.0
The remainder is 583 after subtracting 3852 from 4435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

On to step 9:
642 goes into 5830 9 times with a remainder of 52.
The next digit of our result is 9. 
Result so far: 141646.9
Subtract 5778 from 5830 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 10:
642 can be fit into 520 0 times, resulting in a remainder of 520.
Record the quotient 0 as the next digit in the result. 
Result so far: 141646.9
The remainder is 520 after subtracting 0 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Moving on to step 11:
The number 642 fits into 5200 8 times, leaving a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 141646.908
Subtracting 5136 from 5200 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 12:
640 divided by 642 is 0 with a remainder of 640.
Put 0 as the next digit of the answer. 
Result so far: 141646.908
If we take 0 away from 640, we end up with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

On to step 13:
The number 642 fits into 6400 9 times, leaving a remainder of 622.
The number 9 becomes the next digit in our result. 
Result so far: 141646.90809
Subtracting 5778 from 6400 leaves us with 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Advancing to step 14:
642 goes into 6220 9 times with a remainder of 442.
Use 9 as the next digit of our solution. 
Result so far: 141646.908099
If we subtract 5778 from 6220, we get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

The quotient of the division is 141646.908099, and the remainder is 4.42e-05.