42170994 ÷ 891 
The aim is to understand the frequency of 891 in 42170994.

Moving on to step 1:
891 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 891

On to step 2:
891 goes into 42 0 times with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Take the next digit (1) from the dividend and append it to 42, then repeat: 421 / 891

Let's proceed to step 3:
If we divide 421 by 891, we get 0 and a remainder of 421.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 421, we get 421.
Append the next digit (7) from the dividend to 421 and continue with: 4217 / 891

On to step 4:
891 goes into 4217 4 times with a remainder of 653.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 3564 from 4217 and we're left with 653.
Include the next digit (0) from the dividend after 653, then repeat: 6530 / 891

Step 5:
If we divide 6530 by 891, we get 7 and a remainder of 293.
Use 7 as the next digit of our solution. 
Result so far: 47.0
Subtracting 6237 from 6530 leaves us with 293.
Grab the next digit (9) from the dividend, add it to 293, then carry on: 2939 / 891

Let's proceed to step 6:
2939 divided by 891 is 3 with a remainder of 266.
The number 3 becomes the next digit in our result. 
Result so far: 473.0
Subtracting 2673 from 2939 leaves us with 266.
Grab the next digit (9) from the dividend, add it to 266, then carry on: 2669 / 891

Going ahead to step 7:
When dividing 2669 by 891, we get 2 with a remainder of 887.
Use 2 as the next digit of our solution. 
Result so far: 4732.0
If we subtract 1782 from 2669, we get 887.
Bring next digit (4) of the dividend behind the 887 and repeat the process: 8874 / 891

Moving on to step 8:
8874 divided by 891 is 9 with a remainder of 855.
Put 9 as the next digit of the answer. 
Result so far: 47329.0
Deduct 8019 from 8874 and we're left with 855.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8550, and continue the process.

Let's proceed to step 9:
891 can be fit into 8550 9 times, resulting in a remainder of 531.
Record the quotient 9 as the next digit in the result. 
Result so far: 47329.9
Subtracting 8019 from 8550 leaves us with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

On to step 10:
5310 divided by 891 is 5 with a remainder of 855.
Write down 5 as next digit of the result. 
Result so far: 47329.95
The remainder is 855 after subtracting 4455 from 5310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8550, and continue the process.

Let's proceed to step 11:
When dividing 8550 by 891, we get 9 with a remainder of 531.
Use 9 as the next digit of our solution. 
Result so far: 47329.959
If we take 8019 away from 8550, we end up with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Advancing to step 12:
891 goes into 5310 5 times with a remainder of 855.
Write down 5 as next digit of the result. 
Result so far: 47329.9595
Subtract 4455 from 5310 to get 855.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8550, and continue the process.

Moving on to step 13:
If we divide 8550 by 891, we get 9 and a remainder of 531.
The next digit of our result is 9. 
Result so far: 47329.95959
If we subtract 8019 from 8550, we get 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Let's proceed to step 14:
891 can be fit into 5310 5 times, resulting in a remainder of 855.
The next digit of our result is 5. 
Result so far: 47329.959595
Subtract 4455 from 5310 to get 855.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8550, and continue the process.

Let's proceed to step 15:
891 can be fit into 8550 9 times, resulting in a remainder of 531.
Put 9 as the next digit of the answer. 
Result so far: 47329.9595959
If we subtract 8019 from 8550, we get 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Let's proceed to step 16:
When dividing 5310 by 891, we get 5 with a remainder of 855.
Write down 5 as next digit of the result. 
Result so far: 47329.95959595
Deduct 4455 from 5310 and we're left with 855.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8550, and continue the process.

The final outcome is 47329.95959595, with a leftover of 8.55e-07.