We're dividing 875921 by 42 
The aim is to understand the frequency of 42 in 875921.

On to step 1:
8 divided by 42 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 42

Step 2:
87 divided by 42 is 2 with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 84 from 87, we get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 42

Let's proceed to step 3:
The number 42 fits into 35 0 times, leaving a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Deduct 0 from 35 and we're left with 35.
Append the next digit (9) from the dividend to 35 and continue with: 359 / 42

Let's proceed to step 4:
359 divided by 42 is 8 with a remainder of 23.
Write down 8 as next digit of the result. 
Result so far: 208.0
Subtracting 336 from 359 leaves us with 23.
Grab the next digit (2) from the dividend, add it to 23, then carry on: 232 / 42

Step 5:
When dividing 232 by 42, we get 5 with a remainder of 22.
Put 5 as the next digit of the answer. 
Result so far: 2085.0
Deduct 210 from 232 and we're left with 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 42

Step 6:
If we divide 221 by 42, we get 5 and a remainder of 11.
The number 5 becomes the next digit in our result. 
Result so far: 20855.0
The remainder is 11 after subtracting 210 from 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
If we divide 110 by 42, we get 2 and a remainder of 26.
Record the quotient 2 as the next digit in the result. 
Result so far: 20855.2
Subtracting 84 from 110 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 8:
The number 42 fits into 260 6 times, leaving a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 20855.26
Deduct 252 from 260 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
80 divided by 42 is 1 with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 20855.261
Subtracting 42 from 80 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
When dividing 380 by 42, we get 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 20855.2619
Subtracting 378 from 380 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 11:
When dividing 20 by 42, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 20855.2619
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 12:
If we divide 200 by 42, we get 4 and a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 20855.261904
Subtract 168 from 200 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 13:
42 goes into 320 7 times with a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 20855.2619047
Subtract 294 from 320 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 14:
If we divide 260 by 42, we get 6 and a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 20855.26190476
If we subtract 252 from 260, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 20855.26190476, and the remainder is 8e-09.