The 
line
 graphs depict trends Use synonyms
of
 electrical Change preposition
in
appliances
 Change the noun form
appliance
Use synonyms
usage
 and the Replace the word
used
hours
 spent on doing Use synonyms
house
 Use synonyms
chores
 among Use synonyms
households
 in a country between 1920 and 2019. 
Use synonyms
Overall
, the first Linking Words
line
 Use synonyms
graph
 shows that there was a steady increase Use synonyms
of
 Change preposition
in
Use synonyms
usage
 of electrical appliances (washing machines, refrigerators and Correct article usage
the usage
vacuum
 cleaners) among the Use synonyms
households
 and Use synonyms
in 
the Change preposition
apply
second
 Linking Words
line
 Use synonyms
graph
, it represents that there was a decrease in Use synonyms
hours
 spent by these Use synonyms
households
 Use synonyms
in 
doing Change preposition
apply
house
 Use synonyms
chores
.
In the first Use synonyms
line
 Use synonyms
graph
, there were only 40% and 30% Use synonyms
Use synonyms
households
 using washing machines and Change preposition
of households
vacuum
 Use synonyms
cleaner
 respectively, Fix the agreement mistake
cleaners
while
 none used Linking Words
Use synonyms
refrigerator
 in 1920. Within 20 years, the Fix the agreement mistake
refrigerators
usage
 of Use synonyms
Use synonyms
refrigerator
 experienced Fix the agreement mistake
refrigerators
steep
 increment by 90%, Correct article usage
a steep
while
 both Linking Words
Use synonyms
usage
 of Change to a plural noun
usages
Use synonyms
refrigerator
 and Fix the agreement mistake
refrigerators
vacuum
 cleaners remained steadily Use synonyms
increase
. By 1980, Wrong verb form
increased
Use synonyms
usage
 of Correct article usage
the usage
Use synonyms
refrigerator
 reached its peak and became Fix the agreement mistake
refrigerators
plateau
, followed by Correct article usage
a plateau
Use synonyms
usage
 of Correct article usage
the usage
vacuum
 Use synonyms
cleaner
 which reached its peak in 2000. Fix the agreement mistake
cleaners
However
, the percentage of Linking Words
usage
 of washing Use synonyms
machine
, apart from a slight dip in 1980, continued to be slightly unchanged from 1960 to 2019. 
Fix the agreement mistake
machines
On the other hand
, Linking Words
Linking Words
second
 Correct article usage
the second
line
 Use synonyms
graph
 illustrates Use synonyms
gradual
 decrement Correct article usage
the gradual
of
 Change preposition
in
hours
 spent on hour Use synonyms
chores
 by the Use synonyms
households
. In 1920, a household spent 50 Use synonyms
hours
 per week Use synonyms
to do
 the Change the verb form
doing
house
 Use synonyms
chores
 Use synonyms
such
 as washing clothes, preparing mealsLinking Words
,
 and cleaning. Remove the comma
apply
However
, the number of Linking Words
hours
 spent dropped significantly by 30 Use synonyms
hours
, to 20 Use synonyms
hours
 per week in 1960. From 1960 until 2019, the number of Use synonyms
hours
 spent remained slightly unchanged. The Use synonyms
hours
 spent on Use synonyms
house
 Use synonyms
chores
 in 2019 only dropped by 10 Use synonyms
hours
, in comparison with 1960.Use synonyms